问题
选择题
The earth became so violent that it was not clear_________ the shape would last or not.
A．if
B．how
C．whether
D．why
答案
答案：C
考查：whether常与or not 连用，句意：地球表的如此的猛烈以至于地球的形状是否会持续还是不持续还不清楚。故选C。
搜题请搜索小程序“爱下问搜题”