单项选择题

The term biological clock is applied to (A) the means which (B)living things adjust their activity patterns, without any obvious cue (C), to the time of day (D), or the month, or the year.

A．
B．
C．
D．
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单项选择题
Given(A)their strong suspicion of inherited authority and their almost infinite faith in an individual s right to shape his own destiny, Americans have troubleaccepting(B)social customs whose provenance is unclear andwhose authority(C)they neverconsented(D).
A．
B．
C．
D．
单项选择题
The supervisorwas advised to(A)give the assignmentto whomever(B)he believedhad(C)a strong sense of responsibility, and the courageof conviction(D).
A．
B．
C．
D．
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