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
-- What a pity! You missed the beginning of the movie, it __ for 10 minutes.-- Oh, a traffic jam!
#39193
A
began
B
stated
C
has been on
D
has been off
A large number of students planting trees now, the number of the students 2000.
#41960
A
is, is
B
are, is
C
is, are
D
are, are
—What did you do before you came here? —I in a factory.
#41541
A
worked
B
am working
C
will work
D
work
I bought a computer last year. I ______ it for one year.
#40230
A
buy
B
have bought
C
have had
D
bought