．I have to see the doctor because I________a lot lately．
| A．cough | B．coughed |
| C．have been coughing | D．had coughed |
Tom is not_______as his brother.
| A．good as a student | B．as good a student |
| C．as a good student | D．a as good student |
The police _________ the mountain to ________ the murderer.
| A．is searching; search for |
| B．are searching for; search |
| C．is searching for; search |
| D．are searching; search for |
He told me that he had mailed part of the samples样本 and that the rest _____ in a few days.
| A．were following | B．have followed |
| C．has followed | D．was following |
He will give us a report on how to study English well, but when and where ________.
| A．is still unknown. | B．hasn’t decided |
| C．is known | D．haven’t been decided |
We should work together to build a society for kids, ________free from war and violence.
| A．one | B．this | C．it | D．that |