[单选题] You look so tired tonight.It is high time you_________.

1、[单选题]Keep up good state of mind even if you___________ fail plenty of times.

• A、must
• B、will
• C、can
• D、should

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2、[单选题]This new-type machine____________ little room.

• A、takes up
• B、is taken up
• C、has been taken up
• D、is taking up

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3、[单选题]--I heard that as many as 4 000 people were killed in 9
--Yes.__________ news came as __________shock to us.

• A、the ; the
• B、the ; a
• C、, / ; /
• D、/ ; a

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4、[单选题]Sometimes words alone were not enough to _________pupils along the path of knowledge

• A、provide
• B、persuade
• C、advise
• D、cause

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5、[单选题]Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.

• A、since
• B、before
• C、after
• D、when

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