We must keep our room clean. Dirt and disease go        , you know.
#83346
A
from time to time
B
hand in hand
C
step by step
D
one after another
推荐题目
28. I'm afraid we'll have to work extra hours for there are still some problems ________.
#81046
A
remaining to settle
B
remaining to be settled
C
remained to be settled
D
to remain to settle
Watching TV is ________ a kind of relaxation, and it also _______ our knowledge.
#74626
A
not more than; adds
B
more than; adds to
C
no more than; adds to
D
more than; adds up to