哪位帮忙做几道英语复合句的选择题21-30

哪位帮忙做几道英语复合句的选择题21-30
21. ___ twenty years old . his high school education.
A. Not until he was, he did finish B. Not until was he, he finished
C. Till not was he, he finished D. Not until he was, did he finish
22. ----Can you describe __ it happened?
Yes. I was riding on my bike __ a car knocked me down from behind.
A. when, as B. how, as C. how, when D. how, while
23. According to the conditions of my scholarship, having finished my degree,
A. my education will be accepted by the university
B. employment will be offered to me by the university
C. the university will employ me
D. I'll be employed by the university
24. The visitor asked the guide to take a picture for him ___ stands the famous
tower.
A. that B. where C. which D. who
25. __ people's life is getting better and better, there is a growing demand for
petrol all over the world.
A. Though B. When C. With D. As
26. With the rapid development, the idea has already come true____we can play video games and receive e-mails without
sitting at a keyboard.
A. which B. that C. what D. how
27. I've learned___ , no matter what happens and how bad __ seems today,
life goes on and it will be better tomorrow.
A. it, that B. that, it C. it, it D. that, that
28. --What worries the public most?
prices keep going up, I suppose.
A. That B. What C. Whether D. How
29. __Sarah said showed that she hadn't decided __ to stay or not.
A. What, if B. How, whether C. How, if D What, whether
30. There is no. doubt China will become more and more powerful in the
future.
A. if B. how C. that D. what