19．A.protect B．communicate

　　C．help D．treasure

　　解析：选C。根据前面的develop a sense of community可知，此处表示"这样我们就能彼此帮助(help)"。protect意为"保护"，communicate意为"交流"，treasure意为"珍视"，三项均与句意不符。

　　20．A.dream B．struggle

　　C．management D．style

　　解析：选B。句意：我们为开办餐馆所作出的努力是值得的。dream意为"梦想"；struggle意为"挣扎；努力"；management意为"管理"；style意为"风格"。故选B项。

　　Ⅱ.语法填空

　　(2017·黑龙江哈尔滨期中)Breakfast has been called the most important meal of the day. While every meal counts，the facts are on the table：eating in the morning has positive effects on health and on kids' 1.____________(able)to learn.

　　What's nutritious breakfast? A meal 2.____________(consist) of foods from at least two of the five food groups is the healthiest，3.____________ the truth is that nosh (小吃) of nearly any food in the morning is better than none, especially when it comes 4.____________ kids.

　　It's a good idea to get your child into the habit of eating breakfast before he begins kindergarten. That's 5.__________ youngsters who eat breakfast tend to behave better in school. Hunger makes it harder 6.____________(keep) your mind focused on learning, no matter what your age is. In fact, studies show breakfast skippers are often more bad­tempered and have shorter attention.

　　When you forget eating in the morning, your blood glucose(血糖) drops. Glucose is the fuel your cells need to function, so brain cells become particularly lazy when glucose concentration is insufficient.7.____________ having breakfast, kids would be hard pressed to meet 8.____________(day)nutrient needs, too.

　　You are 9.____________(probable) pressed for time in the morning, and so 10.____________(be)your children.

　　【语篇导读】　本篇文章说明吃早餐的好处与重要性，提出早餐对青少年尤其重要，所以一定要养成吃早餐的习惯。

　　1．ability　设空处位于名词所有格kids'的后面，应用名词形式，故填able的名词形式ability。

　　2．consisting　句意：至少由五大食物种类中的两类组成的一餐是最健康的......。该句谓语为is，is与设空处之间没有并列连词，故设空处为非谓语形式，且作主语meal的定语，meal与consist之间为主动关系，故填consisting。

3．but/yet　根据前后句子的逻辑关系，此处表示转折，所以应填but/yet。