theresearchscientistsoftenmeetwithproblemsnewtypesofinstrumentsfortheirsolution答案是DA.requireB.torequireC.requiredD.requiring为什么是requiring呢?whatisdonsisdone,itisnouseanyoneforitA.blamingB.blameC.to

Question

the research scientists often meet with problems _______ new types of instruments for their solution答案是D
A.require
B.to require
C.required
D.requiring
为什么是requiring呢?
what is dons is done,it is no use______anyone for it
A.blaming
B.blame
C.to blame
D.to be blaming
为什么？

Answer 1

第一题：选D.requiring,因为这里的requiring是现在分词,带上后面的宾语,形成现在分词短语作后置定语.
第二题：选A.blaming,这里是考你对这个句形的掌握："It is no use doing something."这里的doing something其实就是主语,it在这里是形式主语,这句相当于“doing something is no use. ”（做某事是没用的）
整个题干的意思就是“要做的都做了,再为此事去责备任何人是没意义的.”