—I’m sorry．That wasn’t of much help．
— Oh, _______ . As a matter of fact，it was most helpful．
| A．sure it was | B．it doesn’t matter | C．of course not | D．thanks anyway |
Most scientists seem to agree that ________ certain limit should be set on ______
sale of cars to ease air pollution.
| A．a; the | B．/; the | C．the; / | D．the; the |
—I’m confident that we’ll win this time.
—You’ve been practicing so long.
| A．Are you serious? | B．So what? | C．I bet you can. | D．Go ahead. |
I have been so occupied ____ work that I haven’t had time for social activities.
| A．in | B．with | C．from | D．about |
President Obama has two daughters, _____ able to fit in well with their citizens.
| A．both of them are | B．none of them are |
| C．both of whom are | D．neither of who is |
We walked up a mountain to a ridge from _____ we had fantastic views、
| A．that | B．which | C．what | D．where |