I couldn't remember where I'd met him. He then told me he was the man who had given me lunch and helped me find a lift all those years ago. It was Gordon.

1.The author had to hitch a ride one clay in 1978 because .

A.her work delayed her trip to Sydney B.she was going home for her holidays

C.the town was far away from Sydney D.she missed the only train back home

2.Which of the following did Gordon do according to Paragraph 2?

A.He helped the girl find a ride. B.He gave the girl a ride back home.

C.He bought sandwiches for the girl. D.He watched the girl for three hours.

3.The reason why the author offered a lift to the elderly man was that .

A.she realized he was Gordon B.she had known him for decades

C.she was going to the nearby town D.she wanted to repay the favour she once got

4.What does the author want to tell the readers through the story?

A.Giving sometimes produces nice results. B.Those who give rides will be repaid.

C.Good manners bring about happiness. D.People should offer free rides to others.

　　3、It happens every spring. Flowers suddenly burst out everywhere on the same day. But how exactly do plants "know" when to flower?

　　It is a question that has puzzled biologists for years. But according to Science Daily, a US research group may have finally answered it---the secret lies in a protein called FKF1 which allows plants to sense the differences in day lengths so that they can tell the seasons are changing. They found that the protein can be activated (激活) by sunlight.

Plants produce this protein every day in the late afternoon throughout the year. If there is no light at this time, for example, in winter when the sun goes down early, the protein won't be activated. But when spring comes and the days get longer, the protein can be activated by day-light and the plants "know" it is time to flower.