Do you know when ________ today？（ ）
A．is the bookstore closed
B．does the bookstore close
C．the bookstore closes
The accident happened ________ a cold morning but luckily， no one was injured．（ ）
| A． |
at |
B． |
on |
C． |
in |
There are fifty students in this class， ________ of them are boys，so the number of the boys is 30．（ ）
| A． |
three fifth |
| B． |
three fifths |
| C． |
three five |
We should realize that everyone has his or her own merits （优点） and defects （缺点） ， so we must treat them ________．（ ）
| A． |
properly |
B． |
actually |
C． |
exactly |
Sam didn't jump so ________ as Jim in yesterday's sports meeting．（ ）
| A． |
high |
B． |
higher |
C． |
highly |
Sandy really likes eating meat， but she doesn't like eating________．（ ）
| A． |
breads |
B． |
vegetables |
C． |
chickens |