问题
单项选择题
（）the visibility to reduce to one mile by heavy rain，it（）be impossible to rescue the vessel in distress.
A.Was／would
B.Were／would
C.Is／will
D.Is／is to
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
（）the visibility to reduce to one mile by heavy rain，it（）be impossible to rescue the vessel in distress.
A.Was／would
B.Were／would
C.Is／will
D.Is／is to
参考答案：B