Between the two generations, it is often their different views of life and value _____ cause family conflicts.
| A．which | B．what | C．who | D．that |
___, I think, and the problems could be settled.
| A．If you double your efforts | B．So long as you keep up your spirits |
| C．Making greater efforts | D．A bit more efforts |
—He hasn’t finished the work yet. —Well, he _____.
| A．ought | B．ought to | C．ought to have | D．ought to have finished |
Be careful with such things. If you ____, you’ll drop them.
| A．don’t | B．aren’t | C．won’t | D．do |
—Are there any English story books for us students in the library?
—There are only a few, ____________.
| A．if any | B．if some | C．if have | D．if has |
—Alice, why didn’t you come yesterday? —I ___, but I had an unexpected visitor.
| A．had | B．would | C．was going to | D．did |