Not until then did I find it _____ to do the job that way.
| A．is easier | B．easier | C．was more easily | D．more easily |
The clever boy made a hole in the wall, ________ he could see what was going on inside the building.
| A．on which | B．at which | C．through which | D．in which |
—What sort of house do you want to have? Something big?
—Well, it _______ be big—that’s not important. But it _________ have a nice garden—that’s important for me.
| A．mustn’t; need | B．needn’t; must |
| C．couldn’t; need | D．shouldn’t; must |
—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 |