输卵管通液术宜()
A.于月经来潮前14天进行
B.于月经来潮12小时内进行
C.于月经干净当天进行
D.于月经干净后3-7天进行
E.于月经的任何时候进行
参考答案:D
Don’t talk about such things ______you are not sure of, ______ is what you should keep in mind.
A.as; which
B.as; that
C.that; as
D.what; where