小法官巧断案。（对的打“√”，错的打“×”）   

1．小数一定比1小。[ ]

2．小数部分位数越多，这个小数越大。 [ ]

3．32.084读作三十二点零八十四。[ ]

4．小数部分最小的计数单位是0.1。[ ]

5．3.102中的“0”可以去掉。[ ]

6．3.50元和3.5元一样多。 [ ]

7．8-2.3结果是6.3。[ ]

8．计算小数加、减法必须末位对齐。[ ]

The house could fall down soon if no one ______ some quick repair work.

A. has done

B. is doing

C. does

D. had done