The monkey was seen _________off the tall tree.
| A．jump | B．jumps | C．jumped | D．to jump |
A: ________ will we know the results of the test?
B: In a week, I suppose.
| A．How much | B．How far | C．How soon | D．How long |
The scientists ________ on the new medicine for two years. They will succeed in no time.
| A．work | B．are working | C．have worked | D．will work |
That rude man seldom uses kind words, ________?
| A．does he | B．isn’t he | C．was he | D．hasn’t he |
The policeman caught the drunk driver, but he didn’t remember ________ the old lady.
| A．knock down | B．to knock down | C．knocked down | D．knocking down |
After the conversation with the teacher, Jenny’s mother looked a little ________.
| A．happiness | B．happier | C．happy | D．happily |