问题描述：
-aha,i can say good bye to english ,to tell you the truth.i haven't a head for english
-but if you_well in english at middle school,you'll find it a hard time tosay in university.
A.haven't done B.don't do C.hadn't done D.didn't do
-but if you_well in english at middle school,you'll find it a hard time tosay in university.
A.haven't done B.don't do C.hadn't done D.didn't do
问题解答：
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