问题
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
B:hand in hand
C:step by step
D:one after another
正确答案是：
同类题型
When I arrived，Bryan took me to see the house ________ I would be staying.
There are a lot of colorful flowers on sides of the street.
Would you like to tell me about the travel —Great. I really experienced ________.
he group discussion is nearing its end, make sure to ______it with important points.