Not until he left his home __________ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he has begun |
The factory produces half a million pairs of shoes every year, _________ are sold abroad.
| A．80% of them | B．80% of that | C．80% of the shoes | D．80% of which |
China isn't the country _________ she used to be 50 years ago.
| A．that | B．which | C．what | D．since |
Do you have anything is important to tell me?
| A．which | B．that | C．/ | D．it |
.An air France jet is reported________in the Atlantic Ocean with 228 people aboard，the airline’s worst disaster in its 75-year history．
| A．to have crashed | B．to have been crashed |
| C．having crashed | D．having been crashed |
A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework
| A．that | B．if | C．when | D．which |