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New medicines and instruments ______ every day to extend life.

A．develop	B．are being developed
C．are developing	D．have developed

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It was ordered that all the soldiers ____ to the front．

A．should send

B．must be sent

C．be sent

D．must go

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---Can I use the telephone on the table, sir?
---Under no circumstances to use the telephone in the office for personal affairs.

A．anyone is allowed	B．nobody is allowed
C．is anyone allowed	D．is nobody allowed

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---I was riding along the street and all of a sudden, a car cut in and knocked me down.
---You can never be careful in the street.

A．much

B．very

C．so

D．too

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The questionnaire won’t take long, ___________ five to ten minutes.

A．apparently

B．approximately

C．appropriately

D．precisely

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–I want to make a kite to fly.
-- __________ You can easily buy one on the market.

A．Why not?

B．Good idea.

C．Why bother?

D．No way!

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