The boy was having a class when the earthquake broke out in yushu. He could have been killed if he with his family.
| A．had stayed | B．stayed | C．would stay | D．is to stay |
The water supply has been cut off temporarily because the workers________one of the main pipes. (2013·天津，13)
| A．had repaired | B．have repaired |
| C．repaired | D．are repairing |
We are confident that the environment________by our further efforts to reduce pollution. (2013·辽宁，30)
| A．had been improved | B．will be improved |
| C．is improved | D．was improved |
He was unhappy when he sold his guitar.After all，he________it for a very long time.
(2013·辽宁，22)
| A．has had | B．had had |
| C．has | D．had |
—So what is the procedure?
—All the applicants ________ before a final decision is made by the authority.(2013·北京，32)
| A．interview | B．are interviewing |
| C．are interviewed | D．are being interviewed |
Hurry up！Mark and Carol ________ us. (2013·北京，28)
| A．expect | B．are expecting |
| C．have expected | D．will expect |