—Hey, Jack. Waste paper mustn’t ________ here.—Sorry, I won’t do that again. 
#44495
A
throw
B
be thrown
C
be throwing
D
to throw
推荐题目
It is reported that more schools        in Nanjing next year.
#44666
A
will be built
B
were built
C
have built
D
will build
Old people should ________politely.
#44728
A
be spoken to
B
speak
C
speak to
D
to be spoken