To our disappointment, some government leaders ____ their position to get illegal profit for themselves.
| A．occupy | B．take | C．abuse | D．hold |
. We would do more such exercises in the future, I think, ____we did yesterday.
| A．as | B．which | C．that | D．than |
. ____ it will do us harm or good remains to be seen.
| A．If | B．Whether | C．That | D．Where |
. The river, ____ are covered with trees, is very long.
| A．which banks | B．of which banks |
| C．whose the banks | D．the banks of which |
He is rather difficult to make friends with, but his friendship, ____, is more true than any other.
| A．once gained | B．when to gain |
| C．after is gained | D．while gaining |
1. — Have you known each other for long?
— Not very long, ____ we started to work in the company.
| A．after | B．before | C．when | D． since |