问题

How unhappy your roommate looks!—-Yes，but he’s not willing to tell me what it is____ is troubling him.

A:what
B:which
C:as
D:that

正确答案是：

同类题型

I_____ asleep while I was reading——-It doesn’t matter

The lecture is so attractive that the audience are listening_________

In September 2008 , China’s key milestone in space travel_____when Zhai Zhigang conducted the first space walk

me, but could I trouble you for somechange—–_______.Will pennies do

Kate, it’s midnight! Why stay up so late—I’d like to go to bed earlier, but the test paper be handed in tomorrow morning.