Experiments of this kind ___in both the U.S and Europe well before the Second World War.
A.had conducted
B.have conducted
C.have been conducted
D.had been conducted
试卷相关题目
- 1---Mom, can we move into our new house this weekend? ---No, it _________.
A.is painted
B.is painting
C.was painted
D.is being painted
开始考试点击查看答案 - 2---Where_______? —I got caught in the heavy traffic, or I _______ here earlier.
A.did you go; had arrived
B.are you; was
C.were you; would come
D.have you been ; would have been
开始考试点击查看答案 - 3This is the second time that the top 10 list of popular novels _____ published by this magazine.
A.has been
B.are
C.is
D.have been
开始考试点击查看答案 - 4--Who is your new secretary? --Miss Evens. I'm very pleased with the work that she _________ so far.
A.are doing
B.did
C.were doing
D.has done
开始考试点击查看答案 - 5Each of the students, working hard at his other lessons, _______ to go to university. --- So do I.
A.hopes
B.hope
C.hoping
D.hoped
开始考试点击查看答案 - 6—Why are you late today.Mary? —I'm sorry,Mr Li.My bike ________ on the way.
A.broke down
B.has broken down
C.breaks down
D.had broken down
开始考试点击查看答案 - 7--What are you going to do this afternoon? -- I am going to the cinema with some friends. The film _______ quite early, so we __________ to the bookstore after that.
A.finished; are going
B.finished; go
C.finishes; are going
D.finishes; go
开始考试点击查看答案 - 8Tom is the only one of the students who ______ a scholarship since last year.
A.has won
B.have won
C.is winning
D.wins
开始考试点击查看答案 - 9China ________ rapid economic development and political stability over the past three decades, but with them ________ some social problems.
A.has seen; has come
B.had seen; are coming
C.saw; will come
D.has seen; have come
开始考试点击查看答案 - 10Now my father_________his bike to work every day instead of driving.
A.ride
B.rode
C.rides
D.will ride
开始考试点击查看答案