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　 A cough is usually nothing to worry about unless it lasts for ten days　　　 .

A.or more　　 　　　 B.instead　　 　　　 C.at most　　 　　　 D.only

He is very __________ (精力充沛的) and even stays up quite late at night.

— What should I do, sir?
   — ________ the star and then tell me something about it.
A. Notice           B. Observe            C. See                D. Glare

The sentence needs _______once more.

　　A. explained        B. explaining       C. being explained        D. to explain

The reason _____ he gave for being late was _____ he overslept this morning．

A. why; that　　　 B. why; because 　 C. which; that　 　 　 D. which; because

Getting ___ in the forest is very dangerous.　　　　　　　　　　　　　　　　　　　

A. losing　　　　　 B. lost　　　　 　　C. to lost　　　　　 D. being lost

------ Would you like to help me with my lessons after class this afternoon?
------Yes, I`d like to, I`m very busy_______.
A. too    B. though    C. yet    D. either

I saw them ______ (握)hands with each other.?

_______ there on time, we decided to start very early the next morning.

A. Getting　　 　　　 B. To get　　　　　 C. To be got　　　 　 D. For getting

— Robert is indeed a wise man.

— Oh, yes. How often I have regretted ______ his advice!

A. to take　　 　　　 B. taking　 　　　 C. not to take　 　 D. not taking