____ I'm mistaken, I've seen that tall man at a party before.

A．If B．As C．Unless D．When

There are a number of methods to provide relief from your toothache, which can’t cure the problem.

A. permanent B. temporary C. contemporary D. consequent

Only when he told me________what trouble he was in.

A．did I realize B．I realized C．do I realize D．I realize

There is a shortage of teachers in Western China, and it will fall on the 80s and 90s generations to this responsibility.

A. take on B. step up C. make up D. apply for

To avoid on how to use the word, you’d better refer to a dictionary.

A．to get confusedB．getting confused

C．to get confusingD．getting confusing

—What about the student in your class, Mr. Wang?

—The doctor said that sleep caused him poor memory and poor concentration.

A．lacking of B．lacked in C．lacking D．lack for

_______the thick clouds, you would find the kite in the sky easily.

A. Had it not been for B. If it were not

C. If it had not been for D. Were it not for

I would have come earlier, but I _____ that you were waiting for me.

A. didn’t know B. hadn’t know C. would have known D. haven’t known

Will you take my previous experience into when you fix my salary?

A. mind B. thought C. reference D. account

When you go to a foreign country, you must try to the customs there in order to recover from the culture shock quickly.

A. deal with B. adapt to C. focus on D. take over