Question

[CAMERA BẢO NGỌC]

If Tom ______ the examination, it would be so difficult. A. didn’t know B. doesn’t know C. had known D. has known

Answer 1

[Hà Thúy Quỳnh]

If Tom ______ the examination, it would be so difficult. A. didn’t know B. doesn’t know C. had known D. has known

Answer 2

[Ŧöɪ ĸħōɴɢ ʈëŋ]

If Tom ______ the examination, it would be so difficult.

A. didn’t know B. doesn’t know C. had known D. has known