C. Most cases were preventable.

20. What did Wilson's organization do in Africa?

A. It reduced blindness by 10%.

B. It discovered a new drug in 1960.

C. It carried out millions of eye surgeries.

Ⅱ. 阅读理解（共15小题；每小题2分，满分30分）

Four Best Places to Travel for the Summer of 2019

If you're still deciding where to take your summer vacation, 2019 brings major anniversaries, new flight routes, buzzy museum openings and more. In no particular order, check out our picks for where to travel this summer:

Salar de Uyuni, Bolivia

The Salar de Uyuni, or Uyuni Salt Flat, is a vast expanse near the Bolivian Andes that resembles ice. The surreal landscape is actually leftover salt from ancient lakes. A large lounge dome offers a public space with tables, floor cushions and hanging lanterns. Food is provided by Gustu in La Paz, considered one of Latin America's top restaurants. Beyond simply enjoying the food and scenery, guests can hike to the crater of Tunupa Volcano, mountain bike across the Salar or visit the village of Jirira. Come nightfall, on-site telescopes take full advantage of the star-flooded sky.

Las Vegas

There's the Park Theater, where up to 5,200 people can enjoy A-list artist residencies: Lady Gaga is currently in residence until November, with Janet Jackson and Cher starting this summer. For good measure, Bruno Mars will also be performing some dates in September. Daniel Humm and Will Guidara, perhaps best known for NYC's Eleven Madison Park restaurant, are behind the NoMad Restaurant and NoMad Bar. And foodies will no doubt want to experience Roy Choi's Best Friend, the first brick-and-mortar restaurant following his hugely successful Korean BBQ truck.

Nova Scotia

Nova Scotia often gets overlooked for popular provinces like British Columbia and Quebec, but its quiet charms are worth exploring. Cape Breton Island takes a bit of work to reach, but it's here that you'll find challenging hiking trails, a scenic driving route minus the traffic and real-deal Celtic culture. The Halifax Jazz Festival, held in the province's capital, is considered Nova Scotia's largest music festival, and goes down from July 9-14 on the waterfront.

Grand Canyon

It's the Grand Canyon's 100th anniversary as a national park, and there are multiple ways to celebrate this notable occasion. From June 22-29, stargazers can join amateur astronomers for free at the park's North and South Rims for the Star Party. Telescopes will be on hand to find planets (Jupiter and Saturn among them), star clusters and nebulae. There will also be slide show programs with a different focus each night, from protecting dark skies to learning how planets form. Constellation talks and night sky photography workshops are among the free offerings, just allow yourself enough time since you won't be the only one with this idea.

21. Which place will you choose if you want to have a great barbeque?

A. Salar de Uyuni B. Las Vegas C. Nova Scotia D. Grand Canyon

22. Which country is Nova Scotia probably in?

A. Canada B. America C. Britain D. South Africa

23. If you are an Astronomy fans, which two places will be the best choice?

A. Salar de Uyuni and Las Vegas B. Salar de Uyuni and Grand Canyon

C. Las Vegas and Nova Scotia D. Las Vegas and Grand Canyon

Most people agree that being a good driver means being safe and not aggressive on the road. One debate some people still argue, however, is who drives better: men or women? Although it's impossible to say that one gender drives better than another definitively, there are some noteworthy trends.

Male drivers tend to have more accidents

Data from the Insurance Institute for Highway Safety (IIHS) shows that male drivers tend to have more total accidents than females. The IIHS, an independent non-profit devoted to reducing car accidents, also found that 71 percent of all motor vehicle crash deaths in 2017 were males. Although the gap has narrowed, almost every year from 1975 to 2017, the number of male crash deaths was more than twice the number of female crash deaths, per the IIHS.

Women might be less-confident behind the wheel

Although male drivers have more accidents, other research shows women aren't "perfect" drivers, either. Researchers from the University of Michigan's Transportation Research Institute studied traffic accidents over 20 years and found that female drivers are more likely to run into a car driven by another woman than a man. The study, however, doesn't explain possible reasons for this pattern.

One that they might consider testing in the future is that some research also shows women are less-confident behind the wheel than men. A study from UCLA exploring the relationship between new drivers' skills and different variables, including gender（性别）, shows female students were less confident drivers than men.

So are men better drivers than women?