3. It is pretty well understood _____ controls the flow of carbon dioxide in and out the atmosphere today.

A that　　 B when　　　 C what　　 D how

2. It was not until the beginning of the meeting ______ he realized ______ I told him was the only possible way to deal with the problem.

A that; what　　　 B what; that　　 C when; what　　 D when; that

1. –We haven’t been to the Great Wall for ages.

--No, I don’t remember how many years ago _________ I last visited it.

A it was that　　 B was it that　　 C it was when　　　 D was it when

10.他梦想有朝一日成为著名的小提琴家.

He ________ _____ becoming a famous violinist one day.

9.那事故是在什么时候发生的?　 ______ was it _______ the accident happened?

8.直到他父亲进来他才开始准备功课.

　 It was _____ ______ his father came in _____ he began to prepare his lessons.

7.他上的中学就是在附近.　　 ______ is the school ________ he is studying.

6.他觉得老师偏爱学习成绩好的同学.

　 He feels the teacher _______ those who are very academic.

5.在我看来,数目远远不够.　 _____ _____ ________, the sum is _____ _______ enough.

4.只要你达到这些要求,你就会被我校录取.

　 ____ _______ _____ you meet these demands, you will be admitted into our school.