问题
选择题
.
_________ it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.
A.That
B.What
C.Which
D.Whether
答案
答案:B
.
_________ it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.
A.That
B.What
C.Which
D.Whether
答案:B