题目内容

（) the age of eight, he had performed in half the great cities of Europe.

A. after
B. in
C. on
D. by

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The light from the sun moves away from its source in all directions, so its strength is very （) .

A. broken out
B. spread out
C. looked out
D. figured out

— I need to speak to Mr.Tucker.This is a very urgent matter.— （) .

A. Just a minute.Sorry, it is not ready yet.
B. what's the problem？
C. please, I will be waiting.

The atoms of certain substance are excited in such a way （) they produce coherent light.

A. which
B. who
C. that
D. what

—Sorry, sir, it's not ready yet. — （) .

A. Please do.I'll be waiting.
B. Ok, hold on, please.
C. Not yet？ Is there some problem？