问题
单项选择题
The crude oil overflowed from measuring-hole due to（）the valve of No.1 tank.
A.not close
B.not closing
C.not have closed
D.no closing
答案
参考答案：B
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The crude oil overflowed from measuring-hole due to（）the valve of No.1 tank.
A.not close
B.not closing
C.not have closed
D.no closing
参考答案：B