By the time the new pupil ___ enough courage to raise his hand, the bell__ for the end of the lesson
| A．had gathered…was already ringing | B．was gathering…had already rung |
| C．gathered… had already rung | D．would gather… have rung |
During the Spring Festival, the police are ______ the public safety.
| A．getting through | B．working out | C．watching over | D．looking into |
He is a man of great help, with ________ help you can solve the problem easily.
| A． his | B． which | C． whom | D． whose |
We saw a ________ big snake in the grass yesterday, which ________ all of us to death.
A. frightened; frightened C. frightened; frightening
C. frightening; frightened D. frightening; frightening
— Tom, could you go to the supermarket with me?
— I’d like to, but my homework ______ and I have to hand it in tomorrow.
| A．wasn’t finished | B．won’t be finished |
| C．hasn’t been finished | D．hadn’t been finished |
Special attention should be paid to ________ forests from fires in winter.
| A．protected | B．protecting | C．protects | D．protect |