问题
is no simple answer, ________ is often the case in science.
A:as
B:that
C:when
D:where;
B:that
C:when
D:where;
正确答案是：
同类题型
I think computers are really good. They can help us find lots of _______ on them.
Your house is always so clean and everything is in order – how do you ______ it with these children
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