(2019秦皇岛海港区一模)Bob invited me to go for a ________  in his father's new car.

A.walk B.ride C.talk D.step

(2019咸宁改编)I am worried about ________ I can enter a good high school or not.

A.that B.when C.whether D.where

(2019宜昌改编)Time past can not be called back again. Wasting time is a ________．

A.pressure B.fairness C.choice D.shame

(2019安徽改编)How time flies! We ________ in China for so long.

A.work B.worked C.will work D.have worked

the, solved, you, have, yet, problem

________________________________________________________________________？

did, he, in, best, exam, the

________________________________________________________________________.

Peter, fastest, runs, class, the, in

________________________________________________________________________.

finished, homework, my, has, already, been

________________________________________________________________________.

method, your, is, much, than, easier, mine

________________________________________________________________________.

    Although the world is hungry, it is even thirstier. While nearly 3/4 of the earth is covered1.water, we are short of drinking water.2.(actual) about 97% of the water on the earth is sea water.

How can we deal with the problem of lacking drinking water?3.(one), we should save water and not waste it. Second, we should protect our water resources and not pollute 4.(they). Lastly, we should discover ways to reuse water. Scientists have got some5.(achieve) in this field. But people's n6.for water is increasing day by day. We still don't have enough water. What else can we do?

The sea seems to have the 7.(good) answer. There is plenty of water in 8. sea. But we need to take the salt away from the sea water. This is very expensive. We haven't 9.(success) in dealing with the problem.10. scientists can find cheaper ways to do it, we will solve the problem gradually.