________ I didn’t know anybody at the party, I had a good time.

Danny didn't say anything about the matter to Mrs. Green because______.

A. she had known it

B. the other boys told her

C. he didn't want to be in trouble

D. his mother didn't want him to say it

Not until Mr. Smith came to China______what kind of country she is.

A．he knew

B．he didn't know

C．did he know

D．he couldn't know

The mason ______ I didn't do this exercise is I didn't know how to do it.

A．why...because

B．why...that

C．for...that

D．that...because

I didn't attend the conference, but I wish I ______ there.

A．had been

B．be

C．were

D．would be

I' d ______ you didn't touch that, if you don't mind.

A．better

B．happier

C．rather

D．further

(I didn't mind) their coming (late) to the lecture, but I (objected) their making (so much noise).

A．I didn’t mind

B．late

C．objected

D．so much noise

You shouldn't be so ______ —I didn't mean anything bad in what I said.

A．sentimental

B．sensible

C．sensitive

D．sophisticated

I didn't know what to do, but then an idea______ to me suddenly.

A．happened

B．entered

C．hit

D．occurred

I didn' t go to the party, but I do wish I ______ there.

A．were

B．would be

C．had been

D．will be

______your advice yesterday, I would have missed the train.

A．Had I not taken

B．If I didn't take

C．If I haven't taken

D．Provided I didn't take