DO YOU KNOW ...A. WHAT IT WAS WRONG

32. - 3500 CAU TRAC NGHIEM ON TAP AV THCS

3500 CAU TRAC NGHIEM ON TAP AV THCS

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32. Do you know ...

a. what it was wrong?

b. what wrong it was?

c. what's wrong with it?

d. what wrong is with it?

--> c