问题
单项选择题
______no friction between the surface of the road and our feet, we could not walk at all.
A．If there was
B．Were there
C．Was there
D．There was
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
______no friction between the surface of the road and our feet, we could not walk at all.
A．If there was
B．Were there
C．Was there
D．There was
参考答案：A