—What about going shopping together? —Sorry, I have a lot of homework ____. 
#40208
A
do
B
to do
C
doing
D
did
推荐题目
We planted _________ trees last year. Two _________ of them are in the park.
#39582
A
thousands of; hundred
B
thousand of; hundred
C
thousands of; hundreds
D
thousand of; hundreds
There are   books on the shelf. And     them is about three hundred.
#43563
A
a number of; a number of
B
the number of; the number of
C
a number of; the number of
D
the number of; a number of