问题
选择题
________ in the cage for half a day, the bird became hungry.
A．Being kept
B．Having kept
C．Having been kept
D．Have been kept
答案
答案：C
这题考查现在分词完成式做状语的用法,因为the bird是被关在笼子里半天了，才感到饿，有先后关系，选C。
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