Whendidyourcomputergowrong?Las

-When did your computer go wrong?
-Last night, while I_______ some music from a website.

A．downloaded	B．am downloading
C．was downloading	D．have downloaded

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A．are caused

B．were caused

C．have caused

D．will cause

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A．arrive

B．arrived

C．am arriving

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A．sit

B．sat

C．am sitting

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A．writes

B．wrote

C．has written

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--- Excuse me, could you tell me how ______ to Beijing Zoo?
　　--- Well, you may take Bus No.27.

A．get

B．gets

C．getting

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