—Must I finish my homework now, Mom?
—No, you _______.You can do it tomorrow.
A. can’t B. needn’t C. mustn’t
﹣It seems impolite to ask direct questions，____ ？
﹣Yes，but I think it's OK to your close friends.（ ）
| A． |
does it |
B． |
doesn't it |
C． |
isn't it |
In the past people didn't know that light faster than sound.（ ）
| A． |
travels |
B． |
travelled |
C． |
travel |
﹣﹣Did you hear that the Chinese skiing player，Gu Ailing，won the first prize？
﹣﹣Yes，I___ with my friends at that time.（ ）
| A． |
hung out |
B． |
am hanging out |
C． |
was hanging out |
The chopsticks____ food.Now many foreigners with them.（ ）
| A． |
used to eat；are used to eat |
| B． |
are used to eat；used to eat |
| C． |
are used for eating；are used to eating |
It Zhang Guimei many years to help about 1，800 girl students in poor areas realize their college dreams.（ ）
| A． |
took |
B． |
spent |
C． |
cost |