—I’m sure Andrew will win the first prize in the final.
—I think so. He ________ for it for months.
| A．is preparing | B．was preparing | C．has been preparing | D．had been preparing |
31. At that time I still felt ______ my feet were cold and _______ my hands ached terribly.
| A．that; that | B．that; / | C．that; what | D．what; that |
30.The problem lies in ______ the mist may become a thick fog , making the situation even worse.
| A．that | B．which | C．what | D．that whether |
29. Do you think ______ possible for her to work out the difficult problem all by herself?
| A．this | B．that | C．her | D．It |
28. There is no doubt ______ you will be successful in time as long as you study hard.
| A．whether | B．if | C．that | D．What |
27. He often thinks of ______ he can do more for his country, so he is highly spoken of by the people throughout the country.
| A．what | B．that | C．how | D．Whatever |