We haven't seen each other for 20 years but I recognized him I saw him．Which of the foll

问题补充：

We haven seen each other for 20 years, but I recognized him I saw him．

Which of the following is wrong ?

A. immediately

B. the moment

C. as soon as

D. while

答案：

A. immediately

B. the moment

C. as soon as

(答案→)D. while

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