You ________ to help him out.

[　　]

A．should
B．a(chǎn)re supposing
C．a(chǎn)re supposed
D．suppose

答案：C
解析：

考查固定短語。be supposed to do sth表示“應(yīng)該做某事”，相當(dāng)于should do sth。


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