Every possible means ________ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used | C．has been used | D．have been used |
He commanded that the students ______ the classroom before he returned.
| A．not leave | B．didn’t leave |
| C．wouldn’t leave | D．doesn’t leave |
Have you seen John recently ? I wonder _______with his classmates.
| A．that he is getting along well |
| B．if he is getting along well |
| C．how is he getting along |
| D．whether is he getting along well |
Though he failed many times in the election, he never lost_______heart and at last he was elected _____________ president of the USA.
A. the; a B. a; the C. his; the D. /; /
The English teacher ________the importance of reading aloud.
| A．stressed | B．displayed |
| C．admitted | D．observed |
Mr.Black is a careful and experienced engineer，so he is often ________to finishsome challenging tasks.
| A．appreciated | B．approached |
| C．appointed | D．agreed |