The air pollution of the city ____ by 20 percent thanks to the strict measures taken by the government.
| A．has been fallen down | B．has been increased |
| C．has been reduced | D．has been risen |
He spent________money on books and________his books are about space and satellite.
| A．a great deal of；a good many of |
| B．a good many；a great number of |
| C．a large quantity of；a large amount of |
| D．a lots of；plenty of |
I came here only to________that everything was all right.
| A．make up | B．make sure |
| C．make out | D．make use of |
It is not always easy for the public to see ________ use a new invention can be of to human life.
| A．whose | B．what |
| C．which | D．that |
The snowstorm hit the city yesterday，________millions of people homeless.
| A．makes | B．to make |
| C．making | D．made |
I suggested he work out a new plan but he didn’t ________it.
| A．respond to | B．respond |
| C．make response | D．in response to |