﹣I have been to Mars several times．
﹣You ______ be joking．It's impossible．（ ）
A．canB．mayC．must
At the meeting，the managers kept arguing about the problem ______ they reached an agreement.
| A． |
after |
B． |
when |
C． |
until |
D． |
since |
-Simon，I'm afraid we can't complete the model spaceship this afternoon.
一 Well，we _________ finish it today.It's fine if we give it to Mr.Wang tomorrow.
| A． |
can't |
B． |
mustn't |
C． |
needn't |
D． |
shouldn't |
Kate felt excited to see a group of sheep walking _________ her into a village in Qinghai.
| A． |
over |
B． |
past |
C． |
across |
D． |
through |
Susan went into her bedroom and ate chocolate _________，not letting her parents know that.
| A． |
slowly |
B． |
calmly |
C． |
secretly |
D． |
properly |
Mike，a 7﹣year﹣old boy，has a great talent for __________.He can draw nice pictures though he has never learned it.
| A． |
art |
B． |
sport |
C． |
music |
D． |
science |