15. You __________ a psychiatrist if you __________ harder at school.
(A) would be, have studied
(B) would have been, would study
(C) could be, had studied
(D) will, had studied
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統計: A(77), B(33), C(168), D(2), E(0) #1819818
統計: A(77), B(33), C(168), D(2), E(0) #1819818