Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
A.are to challenge
B.have challenged
C.are challenging
D.have been challenged
试卷相关题目
- 1He went to the payphone to make a call but the phone .
A.is broken
B.has broken
C.was broken
D.would break
开始考试点击查看答案 - 2I was just going to move away the heavy case but someone _______ it. Was it you?
A.has done
B.would do
C.had done
D.will do
开始考试点击查看答案 - 3The great man a lot society before he died.
A.have contributed;on
B.had contributed;to
C.contributed;at
D.contributes;for
开始考试点击查看答案 - 4Before you leave the lab, the doors and windows ____shut in case of rain.
A.is
B.are
C.is to be
D.are to be
开始考试点击查看答案 - 5 90 % of the debts _______ so far.
A.is paid back
B.have been paid off
C.has been paid off
D.are paid off
开始考试点击查看答案 - 6In my opinion, this kind of dress _________ professional women like you and me.
A.doesn't fit
B.isn't fit for
C.doesn't suit
D.isn't suited for
开始考试点击查看答案 - 7Many endangered animals, such as the Malayan sun bear, _____ in danger of dying out.
A.remain
B.remains
C.are remained
D.is remained
开始考试点击查看答案 - 8In order to find the missing child, the villagers___________ all they can in the past five hours.
A.have been doing
B.did
C.do
D.had done
开始考试点击查看答案 - 9Either the driver killed in the car or the lucky passenger questioned by the police ______ them very puzzled how this accident has happened.
A.make
B.makes
C.was making
D.were making
开始考试点击查看答案 - 10I first met Mr Smith in Americ
A.He ________ at Stanford University then. A.studied
B.had studied
C.is studying
D.was studying
开始考试点击查看答案