问题描述：
-What did your parents think about your decision?-They always let me do_____ I think i shoud.
WHAT,但如果我在最后should后加上do,可不可以填 that,如果还是不行,要怎么改才能填that
WHAT,但如果我在最后should后加上do,可不可以填 that,如果还是不行,要怎么改才能填that
问题解答：
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