The volunteers a lot of help to the community for nearly ten years.
| A．offered | B．are offering | C．will offer | D．have offered |
Over 20 countries joined to search _________ Flight MH370 in the southern Indian Ocean.
| A．of | B．for | C．in | D．from |
Nowadays many parents make their children study various subjects _________ weekends.
| A．with | B．at | C．by | D．to |
New Year’s Eve is always _________ noisiest night throughout China.
| A．a | B．the | C．an | D．/ |
Now the senior people in our country live a happy life.Which of the following is correct for the underlined word in the sentence?
| A．[læv] | B．[liv] | C．[li:v] | D．[laiv] |
The air in Rizhao is getting much _____ now than a few years ago .
| A．clean | B．cleaner | C．cleanest | D．the cleanest |