—___________ makes her different from the other students?
—Diligence, I think.
| A．How is it that | B．How is that |
| C．What is it that | D．What is that |
—The problem is very difficult. I'm afraid you can't work it out now.
—I fail this time, I will try it again.
| A．Even if | B．Since | C．As if | D．Though |
Richard looked at the envelope andJenny's handwriting immediately.
| A．recognized | B．found | C．realized | D．concerned |
There's a big difference between saying you'll do something anddoing it.
| A．actually | B．frequently | C．gradually | D．certainly |
It was their old carmy friend and his father sold to a Mexican last week.
| A．when | B．which | C．whether | D．that |
Whilein Scotland, he made friends with the natives there.
| A．working | B．worked | C．he works | D．he is working |