—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
 They can’t go out to work        the heavy rain.
#42372
A
because
B
since
C
because of
D
as a result
There’s ______ here and there. Let’s sweep it away. 
#40606
A
students
B
people
C
balls
D
litter