When was it ______ you met Yao Ming in the street?
| A．as | B．if | C．while | D．that |
—How about the walls?
—The walls are_________ thick.
| A．three-inch | B．three inches |
| C．three-inches | D．three inch |
__________fashion differs from country to country may reflect the cultural differences from one aspect.
| A．What | B．That | C．This | D．Which |
Some people are too particular about school records，insisting that every applicant __________
all diplomas from elementary school to university.
| A．has | B．will have | C．should have | D．must have |
It is time that the government__________measures to protect the rare birds and animals.
| A．takes | B．took | C．has taken | D．taking |
He speaks English as fluently as if he__________an Englishman.
| A．were | B．had been | C．is | D．has been |