—The light in his room is still on.Do you know________?
—In order to prepare for the coming exam.
A.if he works hard |
B.why he stays up so late |
C.why is he so busy |
D.when he will stop working |
—The light in his room is still on.Do you know________?
—In order to prepare for the coming exam.
A.if he works hard |
B.why he stays up so late |
C.why is he so busy |
D.when he will stop working |