The volunteers a lot of help to the community for nearly ten years.
| A．offered | B．are offering | C．will offer | D．have offered |
Reading in the sun is ______ to your eyes.
| A．hopeless | B．harmful | C．harmless | D．careless |
Mr Green has lived in China _______ two years ago.
| A．before | B．after | C．for | D．since |
I think she is ________at dancing than singing.
| A．better | B．good | C．well | D．best |
He goes to work early on workdays _________ Saturday and Sunday.
| A．except | B．besides | C．and | D．besides |
There will be trees and pollution in the future.
| A．less, more | B．more, fewer | C．more, less | D．less; less |