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單項選擇題

What these young men were doing（）a threat to the safety of the whole neighborhood.

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

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單項選擇題

Doctors hope to（）a human heart into the patient within the next few days.

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

單項選擇題

The tension（）as the guest of honor was about to announce the winner.

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

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