Only when we failed ________ the importance of study.
| A．we realized | B．we had realized | C．did we realize | D．had we realised |
I was trying to pick up my hat that __________ off in the wind, but failed at last.
A. had been blown . is blownC. blown D. it had been blown
The news quickly spread ______ China has successfully launched another manned spaceship.
| A．which | B．that | C．when | D．while |
A total of 264,302 people in the country were reported __________ with HIV by the end of last September.
| A．to have been infected | B．to be infected |
| C．to having been infected | D．to have infected |
The Premier says that bilateral relations will grow smoothly and steadily _____ both countries follow the principle contained in the joint documents.
| A．as far as | B．though | C．unless | D．as long as |
We were aware that, _____, the situation will get worse.
| A．if not dealing with carefully | B．if dealt not carefully with |
| C．if not carefully dealt with | D．if not carefully dealing with |