(·湖南省长沙市一中高三上第二次月考) ____ they are closest friends is not clear though they live together.
A. That B. If C. What D. Whether
(·湖南省长沙市一中高三上第二次月考) ____ they are closest friends is not clear though they live together.
A. That B. If C. What D. Whether
D