He ________ to get a high position in the company，but failed because of his poor ability of communication.
| A．attempted | B．managed |
| C．thought | D．succeeded |
—I don’t understand why you didn’t go to the lecture yesterday afternoon.
—I’m so sorry.But I________my homework. (2013·湖南，34)
| A．had done | B．was doing |
| C．would do | D．am doing |
If nothing________，the oceans will turn into fish deserts. (2013·湖南，26)
| A．does | B．had been done |
| C．will do | D．is done |
Around two o’clock every night，Sue will start talking in her dream.It somewhat________us. (2013·湖南，24)
| A．bothers | B．had bothered |
| C．would bother | D．bothered |
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 |