The man is ________danger to society. Therefore，people around him are in ________danger all the time.
| A．the；a |
| B．/；/ |
| C．an；a |
| D．a；/ |
27．—What did you ______ while in college?
—English, politics and economics．
| A．take up | B．think up | C．bring up | D．make up |
26．I called Nancy many times but couldn't get through．Someone ______ on the phone all the time!
| A．has been talking | B．was talking |
| C．has talked | D．Talked |
25．How convenient the public transportation is! There ______ be any difficulty traveling around．
| A．mustn't | B．wouldn't | C．shouldn't | D．needn't |
24．—I just heard you had an adventure in the desert．
—We lost our way and ______ made matters worse was that our jeep broke down．
| A．how | B．that | C．it | D．What |
23．______ is reported, a new town has been built on the ruins left by the big earthquake．
| A．It | B．As | C．Which | D．This |