This river has changed its course many times. It _________ always located where it ________ at present.
| A．isn’t; is | B．isn’t; will be | C．wasn’t; is | D．wasn’t; has been |
Not until he met with the difficulty _______ the importance of group work．
| A．he realized | B．did he realize | C．realized he | D．he didn’t realize |
The thief must have hidden somewhere in the _______ area．
| A．following | B．surrounding | C．surrounded | D．surroundings |
I do not want to accuse him _____ telling lies．
| A．of | B．against | C．with | D．about |
Local villagers ______the doctors with the people ______ in the bus crash.
| A．assisted; wounded | B．aided; wounding |
| C．help; wounding | D．saved; wounded |
Time, _____correctly, is money in the bank．
| A．to use | B．used | C．using | D．To use |