The number of the students in our school ___ 1,000, and a number of them ___ boys.
| A．is, are | B．is, is |
| C．are, is | D．are, are |
At the meeting the boss was explaining his plan while his secretary_________ the notes.
| A．is taking | B．was taking | C．has taken | D．takes |
Mr. White spent about one hour and a half _________ the accident report yesterday evening.
| A．write | B．written | C．writing | D．to write |
To live a green life, we try_________ more energy and produce less pollution.
| A．to save | B．save | C．saves | D．saved |
In recent years the environmental pollution has been _________ than before.
| A．so serious | B．serious | C．more serious | D．too serious |
．It is said that a wooden bridge_________ over the river in the mountain village soon.
| A．build | B．will be built | C．will build | D．built |