—There's someone knocking on the door．Who it be?—It must be Mary．She promised to be here at 8：00．
#62257
A
must
B
can
C
shall
D
need
推荐题目
Curious about the world around him, my son__ __ask me endless questions when he was young．
#63640
A
could
B
might
C
should
D
would
You____Tom at the party yesterday;he went abroad for a holiday last week.
#63294
A
should have seen
B
might have seen
C
mustn’t have seen
D
couldn’t have seen
-I walk such a long way on such a hot day .-Oh, dear ! You____ be tired and thirsty. Sit down and have a drink.
#75537
A
can
B
must
C
may
D
should
Our playground is not so tidy and beautiful as before, students must ____ dirty things on it.
#74989
A
be stopped to throw
B
be stopped throwing
C
stop to throw
D
stop from throwing