–I tried many times, but I still failed in the experiment.
--Don’t be discouraged. _______ and the problem will be settled.
| A．Having a little effort | B．There is a little effort |
| C．If you have a bit effort | D．A bit more effort |
It is generally considered unwise to give a child _____ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
He insisted that he _____ from heart trouble, but I didn’t think so.
| A．should suffer | B．has suffered | C．suffers | D．was suffering |
The professor referred to _____ yesterday.
| A．come | B．came | C．coming | D．comes |
He got completely _____ when he saw both Lucy and Lily, who are twin sisters.
| A．confusing | B．confused | C．confuse | D．confuses |
--- Shall I open the window to let some fresh air in?
--- No, _____
| A．I’d rather not | B．I’d rather you not |
| C．I’d rather you didn’t | D．I’d like not to |