高等继续教育 / 统考英语B
正确率:统考%
题型描述: 单选题
A. whether
B. if
C. that
D. about which
The argument remained heated ______ there are necessary conditions of existence such as water on the Moon.
A. whether
B. if
C. that
D. about which
参考答案:
佳题速递: