These boxes ______ for keeping the food clean and cool.
#39501
A
use
B
are used
C
have used
D
were using
推荐题目
A moment, please．I'm checking if Mr. Smith _________ free tomorrow．
#40157
A
is
B
being
C
to be
D
will be
Peter has many brothers, but he _________ have any sisters.
#41604
A
is not
B
can not
C
did not
D
does not
— Mom, my classmates are playing outside. Can I join them?— Not until your homework .
#36904
A
finishes
B
is finished
C
finished
D
was finished
--- It’s difficult for the village children to cross the river to get to school.--- I think a bridge ________ over the river.
#39418
A
should be built
B
should build
C
was built
D
has been built