题目内容
-How long ________ it ________ you to work out such a difficult problem?
-About thirty minutes.
[ ]
A.
did…take
B.
does… take
C.
did…cost
答案:A
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题目内容
-How long ________ it ________ you to work out such a difficult problem?
-About thirty minutes.
did…take
does… take
did…cost