﹣Joan has made great progress in speaking Chinese．
﹣She_________works hard at it，you know．（ ）
| A． |
never |
B． |
seldom |
C． |
always |
I hope to go to France some day _______ there are many famous museums．（ ）
| A． |
though |
B． |
unless |
C． |
because |
D． |
where |
Tom with his friends _______ to Shanghai many times before．（ ）
| A． |
have gone |
B． |
have been |
C． |
has gone |
D． |
has been |
Don't make noise in the hospital， _______？（ ）
| A． |
do you |
B． |
will you |
C． |
won't you |
D． |
don't you |
It's important for us _______ to our teachers when we have problems．（ ）
| A． |
to talk |
B． |
talking |
C． |
talks |
D． |
talk |
-Must I leave the reading room before 6o'clock？
-No， you _______． You can stay here until 6：30．（ ）
| A． |
can't |
B． |
needn't |
C． |
mustn't |
D． |
shouldn't |