.
The building burnt down in a big fire. _________was the base on which it stood.
| A．What remained | B．All remained |
| C．What was remained | D．All what remained |
They soon ______ doing the same thing day after day, and finally gave up.
| A．got tired of | B．got along with | C．got away from | D．got down to |
I like to listen to music ______ I’m having a walk in the evening.
| A．since | B．after | C．while | D．before |
______ the terrible pollution, so many beautiful fish are fast disappearing in the river.
| A．According to | B．Because of | C．Because | D．As a result |
All of us found ______ difficult to work out the maths problem.
| A．what | B．that | C．which | D．it |
Doyouhappentoknow________?
| A．whereisheraddress | B．inwhichplaceisheraddress |
| C．whatheraddressis | D．theplaceheraddressis |