I wondered what difficulty he had _____ the plan.
The house caught___fire last night but no one knows who set ___fire to it. A. X;X B.X;a C, a; a D, a; X
The humans are destroying nature day by day,__________of course,will cause severe punishment from it sooner or later.
.The final examination is coming up soon. It's time for us to ____our studies. A, get down to B, get our C, get back for D, get over
---What do you think of the book? ---Oh,excellent. It's worth____a second time. A. to read B.to be read C, reading D,being read
---Have you ____some new ideas? ---Yeah. I'll tell you later.