To protect the environment ,we have done to stop all kinds of pollution.
A. useful nothing
B. something useful
C.anything useful
They went out for a walk at night, _______ ?
| A．didn’t they | B．did they | C．were they | D．weren’t they |
---He never stays up late at night, _____ he?
---_________. He usually does his homework till midnight.
| A．doesn’t, Yes | B．does, Yes | C．doesn’t, No | D．does, No |
--- He’s never heard to sing a pop song so loudly,_____ he?
--- ___________. He is so shy.
| A．is; No | B．is; Yes | C．has; Yes | D．has; No |
— paper cutting used during the Spring Festival?
— People usually put them on doors or windows.
| A．Why did | B．Why is | C．How is | D．How did |
---_____ you at home last Friday? ---No, I _______.
| A．Were, wasn’t | B．Were, weren’t | C．Was, wasn’t | D．Did, didn’t |