题目内容
He changed so much that only when I looked closely________he was exactly my long lost friend.
| A.I realized | B.did I realize |
| C.I did realize | D.realized I |
B
B 考查倒装句。Only 修饰状语when I looked closely,后面的主句要部分倒装,把助动词did提前,因此选B。
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