很有意思,

题目

很有意思,
1.____that snow men were often spotted on the mountainside above 7000 meters by the local in havitants .
a.It was used to be saying
b.It used to be said
c.It used to say
d.It was used to saying
请问哪一句是对的啊?并说出为什么
2.Water will continue to be ____ it is today ____ next in important to oxygen.
a.how
b.which
c.as
d.what
3.The professor could hardly find sufficient grounds ___his arguments in favor of the new theory.
a.to be based on
b.to base on
c.which to base on
d.on which to base
to base on on which to base 这两句应该都对啊.
4.Basic reaearch provides the capital fund scientific knowledge ___which the applied researchers draw to give society a rich rate of interest.
a.on
b.out
c.up
d.back
请问答案是哪个.并翻译.
第二题...有两个空呢..两个都填HOW么?
第三题....IN WHICH TO DO 有两种形势...
IN WHICH TO DO TO DO IN AND IN WHICHI 加从句

答案

1.B used to do是过去常常的意思,由于是传说,所以要用be said.
2.A how 形容重要的程度,用how.
3.D base用作"支撑...观点"是及物动词
base on是基于的意思,是观点作主语
4.题目好像有问题