问题

If you are weak _ a subject, __ and asking a teacher for advice can help.

A:at; working hard
B:in; work hard
C:at; work hard
D:in; working hard;

正确答案是：

同类题型

Could you tell me ______— In two days.

What has Tom been doing recently?-I don’t know, ____care.[ ]

We should do more such exercises in the future, I think, ____ we did yesterday.

Is this your ruler – Yes, it’s ________

My sister spends as much time as she can_______.