单项选择题All units of measurement are(), because space, time, weight, and other dimensions are not naturally divided into units.

A.objective
B.traditional
C.artificial
D.controversial


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2.单项选择题I didn't expect that he would take()of my failure to achieve his own goal.

A.chance
B.effect
C.occasion
D.advantage

3.单项选择题The pioneers()their journey after a short rest.

A.assumed
B.presumed
C.resumed
D.consumed

4.单项选择题When she retired she did a lot of()work for the Red Cross.

A.valid
B.portable
C.prosperous
D.voluntary

5.单项选择题What these young men were doing()a threat to the safety of the whole neighborhood.

A.constructed
B.contracted
C.constituted
D.contributed

6.单项选择题Doctors hope to()a human heart into the patient within the next few days.

A.transfer
B.transform
C.transplant
D.transport

7.单项选择题The tension()as the guest of honor was about to announce the winner.

A.mounted
B.accented
C.climbed
D.raised

9.单项选择题Harry()his pants at the seams (接缝) when he bent over.

A.sliced
B.split
C.cracked
D.broke