单项选择题
A.had had to
B.had to
C.has had to
D.has to
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单项选择题
A.emergencyB.urgencyC.crucialD.immediacy
A.emergency
B.urgency
C.crucial
D.immediacy
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单项选择题
A.heartB.liverC.brainD.nerves
A.heart
B.liver
C.brain
D.nerves
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