The American girl has a good __________ of Chinese and can express herself freely in the language.
| A．item |
| B．series |
| C．command |
| D．usage |
When I met him the other day, it was the first time we _____ each other since we were at school.
| A．saw | B．had seen | C．were seeing | D．have seen |
He must be getting thin, for his trousers _____ badly like a flag in the wind.
| A．are flowing | B．flow | C．flowed | D．have flowed |
“All ______ present, and all ______ going on smoothly.” Said the secretary.
| A．are; is | B．are; are | C．is; is | D．is; are |
--- We really enjoyed ourselves at the party. Thanks again, Mr. and Mrs. Smith.
--- ________. Just drop in whenever you feel like it.
| A．With pleasure | B．Our great honor |
| C．Nice to meet you here | D．Nice having met you here |
____ you have the chance to go to university in the future, you must take it.
| A．Will | B．Should | C．Would | D．Could |