A new kind of drug ___ ___ to cure H7N9 bird flu by the scientists and they are hopeful that they will succeed in a couple of weeks.
| A．has been developed | B．is being developed | C．is developing | D．has developed |
—The windows are dirty.
—I know. They _________ for weeks.
| A．haven’t cleaned | B．didn’t clean |
| C．weren’t cleaned | D．haven’t been cleaned |
Do you remember the name of the company ___________?
| A．where she works at | B．in which she works |
| C．for which she works in | D．in where she works |
—Is Pro. Smith giving the speech today?
—It __________ be him. He is abroad right now.
| A．can’t | B．needn’t | C．won’t | D．mustn’t |
----Were you disappointed when you received the book bought through the Internet?
----Well, yes, _____. The back cover was a bit torn, but it didn’t really matter.
| A．sort of | B．very much | C．not at all | D．never mind |
----Jack can’t concentrate on his lessons recently.
----Yes, that might _____ his low score in the last test.
| A．stand for | B．apply for | C．account for | D．call for |