A stupid man tells a woman to shut up，while a wise man tells her that her mouth is quite beautiful it is closed．（ ）
| A． |
unless |
B． |
since |
C． |
when |
D． |
though |
We all know that one of the world's most popular sports football．（ ）
| A． |
am |
B． |
is |
C． |
are |
"Cindy，how far is it from your home to school？""About 20 walk．"（ ）
| A． |
minutes |
B． |
minute's |
C． |
minutes' |
We should not trees in order to make our environment more beautiful．（ ）
| A． |
write down |
B． |
cut down |
C． |
turn down |
Xiao Ming，you'll be late for school______you hurry up．（ ）
| A． |
after |
B． |
though |
C． |
unless |
Grace often gets nervous before she gives a speech ．（ ）
| A． |
in pubic |
B． |
in total |
C． |
in common |