问题

The idea for the new plan came to his mind, to his experiment in the lab.
A:while devoting
B:while devoting himself
C:while he was devoted
D:while devoted
B:while devoting himself
C:while he was devoted
D:while devoted
正确答案是:
同类题型
Excuse me. Is there a fruit market_____ the neighborhood?[ ]
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Ted usually _____ up early in the morning,but yesterday he____ up very late.