The boy didn’t prepare for the test today; the...

Câu hỏi: The boy didn’t prepare for the test today; therefore he can’t finish it on time.          

A If the boy had prepared for the test today, he could have finished it on time.

B If the boy prepared for the test today, he could finish it on time.

C If the boy prepared for the test today, he could have finished it on time.

D If the boy had prepared for the test today, he could finish it on time.