單項(xiàng)選擇題The survival of civilization, as we know, is()threat.

A.with in
B.under
C.to wards
D.upon


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1.單項(xiàng)選擇題The wise man exercises()in his behavior and enjoyments.

A.limitation
B.interest
C.restriction
D.restraint

2.單項(xiàng)選擇題The police will give you a ticket if you()the speed limit.

A.break
B.reject
C.suspend
D.exceed

3.單項(xiàng)選擇題I guess the whole paper has to be rewritten; only the first few paragraphs may be()

A.sustained
B.contained
C.maintained
D.retained

4.單項(xiàng)選擇題Very few plants will()without water.

A.flourish
B.fade
C.stem
D.cultivate

5.單項(xiàng)選擇題Years of()labor had hardened his muscles.

A.survival
B.mental
C.restless
D.manual