题目内容
（请给出正确答案）
So far there is no proof ______ spaceships from other planets do exist．
A．which
B．that
C．how
D．what
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更多“So far there is no proof _____…”相关的问题
A.so far
B.ven if
C.so that
Amazon is （） the largest remaining rainforest area left on our planet．
A.so far
B.by far
C.thus far
D.as far as
Not a______has been found so far that can help the police find the criminal.
A．fact
B．clue
C．symbol
D．sign
You can go out,()you promise to be back before 12 o'clock.
A. so far as
B. as far as
C. as long as
A、by far
B、by which
C、so far
D、near by
"It' s too bad Rhonda is moving to Arizona. " " I wish it so far away. "
A．weren't
B．couldn't be
C．won't be
D．isn't
A、as far,as
B、so much,as
C、so,as
D、such,as
We have made ______ attempts to solve the problem，but so far our efforts have been unsuccessful．
我们作了许多尝试来解决这个难题，但是到目前为止，我们的努力还没有成功。
