Washing hands thoroughly is one of the effective ways to avoid ________ by virus.
| A．being infected | B．infecting |
| C．to be infected | D．to infect |
He has changed a lot. He _______ not what he _______.
| A．is, is | B．was, was |
| C．is, was | D．was, is |
“I suppose you _________ that report yet?” “I finished it yesterday, as a matter of fact.”
| A．didn’t finish | B．haven’t finished | C．hadn’t finished | D．wasn’t finishing |
—The dinner was delicious!
—I agree. I’m so full.
—That’s too bad. But some dessert ______.
| A．has ordered | B．will be ordered |
| C．has been ordered | D．was going to be ordered |
In the terrible dream he found himself on the surface of a strange animal but it ______ to be his own pillow.
| A．turned out | B．turned over | C．turned down | D．turned off |
New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.
| A．is used; not to pollute | B．has used; is not polluted |
| C．is being used; do not pollute | D．has been used; to pollute |