The argument remains extremely heated __
题型:选择题
问题:
The argument remains extremely heated ______ there are necessary conditions of existence such
as water on the Mars . [ ]
A. that
B. whether
C. if
D. which
The argument remains extremely heated ______ there are necessary conditions of existence such
as water on the Mars . [ ]
A. that
B. whether
C. if
D. which