The windows of the classroom ________ every day.
| A．should be cleaned | B．should clean |
| C．are cleaning | D．is cleaned |
The new headmaster looks _________ to all the teachers and students of the school.
| A．friendly | B．seriously | C．probably | D．gently |
If the kids stay indoors all the time and get no exercise, they _________ weak.
| A．become | B．have become | C．will become | D．became |
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 |