Nothing he did was helpful to solve this problem, _______?
| A．didn’t he | B．was it | C．wasn’t it | D．did he |
The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.
| A．which; what | B．through which; what |
| C．through that; what | D．what; that |
------How do you like the book?
-----It’s quite different from ___ I read last month.
| A．the one | B．which | C． that | D．the one what |
Can you lend me the novel ______ the other day?
| A．that you talked | B．you talked about it |
| C．which you talked with | D．you talked about |
I have seen trees, _____ open at sunrise and close at sunset.
| A．which the leaves | B．of that the leaves |
| C．whose leaves | D．its leaves |
___ is known to all, China is a developing country, belonging to the third world.
| A．It | B．That | C．As | D．Which |