________ is often the case, he didn't study hard and failed to pass the test.

A) The test is not reasonable.B) He is worried he might fail.C) It is not as difficult as he thought.D

A、
B、
C、
D、

John failed in the test. ______ he had worked hard before the test.

A、Only if

B、If only
C、Only when
D、Even if

The reason why he didn't pass the final examination is ______ he wasn't interested in study.

A、which
B、/
C、that
D、because

I didn’t understand why he couldn’t pass the test no matter _______hard he had tried.