---____ do you study for a math test? ---I study math ____ lots of exercises.
| A．What, by doing | B．How, by doing | C．How, doing | D．What, doing |
Although he is very old, ______ he works very hard
| A．so | B．but | C．and | D．/ |
It’s cold, so we decided ______at home.
| A．stay | B．to stay | C．staying | D．stayed |
I didn’t go to the mountains ______the bad weather.
| A．so | B．because of | C．because | D．but |
---______ was your vacation?
--- It _____ exciting.
| A．How： were | B．What： were |
| C．How： was | D．What： was |
There is ________ wrong with his eyes. He can’t see things clearly.
| A．something | B．anything |
| C．nothing | D．everything |