问题补充:
I an engineer when I grow up.
A. am
B. was
C. will be
D. has been
答案:
A. am
B. was
(答案→)C. will be
D. has been
解析:句意:当我长大时,我将是一名工程师。 If或when 引导的时间状语从句用一般现在时表示一般将来时,因此此处的意思是我将来长大时,因此主句用一般将来时,故选C。
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