7、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 |
15．A large____of money is spent on the Hope Project and a good inany schools____step．
A amount：has been B amount：have been
C．number；has been D deal；have been
13．About 90 percent of the equipment presented by the administration，as well as the facilities of our own， ______made good use of in teaching．
| A．have | B．has | C．have been | D．has been |
18. ______changed，and whatever men can do，woltllen call do，too
A Age had B Ages have C．Times have D Time has
12．______of the land in that district_____covered withtrees and grass.
A．Two-fifth；is B．Two-fifth；are C Two-fifths；is D Two-fifths；are
21． More than one high official_____by the police since the mayor war shot dead.
| A．has been questioned | B．have been questioned |
| C．was questioned | D．were questioned |
Over 80 percent of the population of China _____ peasants.
| A．was | B．is | C．are | D．willbe |
There _____a knife and fork on the table.
| A．seemstobe | B．seemtobe | C．isseemingtobe | D．are |
主谓一致
. On entering the room, we saw one and a half apples ________ left on the table.
| A．is | B．are | C．has | D．have |
I have two brothers, neither of them __ at home now.
| A．are | B．is | C．am | D．be |
He is the only one of the students who _______ a winner of scholarship(奖学金) for three years.
| A．is | B．are | C．has been | D．have been |
The excellent service of the waiters ______highly praised．That’s why the restaurant is always full of people．
| A．were | B．are | C．was | D．is |
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