说明理由1.Eachofthemknewtheprobablepurposeofinstandingthere,andneitherspoke.A.theotherB.anotherC.othersD.theothers2.Thisscientistisknownonthisproblemforabouttenyears.A.toworkB.tobeworkingC.tohavebeen

Question

说明理由
1.Each of them knew the probable purpose of _____ in standing there,and neither spoke.
A.the other B.another C.others D.the others
2.This scientist is known _____ on this problem for about ten years.
A.to work B.to be working C.to have been working D.to have been worked

Answer 1

【参考答案】
1、答案选A.
由neither spoke（两个人都不说）,可以看出只有2个人.
与each相对的另一个人,用代词the other.
翻译：他俩都知道站在那儿的可能目的,但都不说.
2、答案选C.
现在完成进行时态,意思是：
那个科学家因为截至目前已在该课题上研究了近10年时间而知名于世.