Pollution is a serious problem. Scientists have _______ some good ways to save it.
| A．come up with | B．come on | C．come out | D．come up |
______ you say sorry to your uncle, he won’t forgive you.
| A．Although | B．Unless | C．If | D．Since |
______ nice time the boys had playing football with the national team last Sunday!
| A．What | B．What a | C．How | D．How a |
—Must I finish the paper tonight? —No, you _______ finish it tomorrow.
| A．must | B．needn’t | C．can | D．shouldn’t |
—I watched ______ film Let the bullet fly with my friend last night.
—Oh, really? It’s really ______ interesting one.
| A．the; an | B．a; the | C．a; an | D．the; a |
Kate was not sure_______.
| A．that she should go through the third gate |
| B．if she should go through the third gate or not |
| C．which gate should she go through |
| D．which gate she should go through |