21.The professor has done some research on wild plants for 20 years.
----Oh! He must have ________a lot of difficulties.
A. gave in B. cared about C. joined in D. gone through
22.Armed with the information you have gathered, you can _______preparing your business plan . A. set out B. set about C. set off D. set up
23. It was not until I came here ________I realized this place was famous for not only its beauty but also its weather. A.who B. that C. where D. before
24.There was ________time _______I hated to go to school .
A. a; that B. a; when C. the ; that D. the ; when
25. ________get to the company on time, we set out early in the morning .
A. So as to B. In order to C. So that D.In order that
26. This is the first time we ________a film in the cinema together as a family .
A. see B. had seen C. saw D. have seen
27. It’s no use _______without taking any action .
