.
This city, _____ lies in the northeast, was the country’s busiest port from 1648 to 1950.
| A．that | B．which | C．of which | D．where |
The school headmaster forbids ______ in the office.
A. smoking B. to smoke C. us smoke D. from smoking
We were listening closely to the lecture yesterday evening when suddenly the light ________.
| A．had been gone out | B．go out |
| C．was gone out | D．went out |
________ the manager has arrived, we can begin our discussion right away.
| A．If | B．When | C．Now that | D．Even if |
He has always insisted on _______ Dr Turner instead of Mr Turner.
| A．been called | B．called | C．calling | D．being called |
After a short ________, I got my bag from the thief’s hand successfully.
| A．exchange | B．explanation | C．encouragement | D．struggle |