We must keep our room clean. Dirt and disease go , you know.
A. from time to time
B. hand in hand
C. step by step
D. one after another
网友回答
A. from time to time
(答案→)B. hand in hand
C. step by step
D. one after another
解析:这题考查词组辨析:A. from time to time时而, B. hand in hand手拉手,C. step by step一步步D. one after another一个接一个,句意是:我们要保持房间干净,灰尘和疾病是一起来的。选B。