Question

三道英语单项选择

求权威，解析。
1.Scientists_______a lot of progress with that experiment over the last two years,but more work still needed,
A,made B.are making C.have made D.had made

2.My parents began to get to know each other about 20years ago,_____they were still college students.
A.on which B.at which C.when D.where

3.The girl's dream was to have a study,____she could read books on her own.
A,from which B.of which C.in which D.during which
好的给分。

Answer 1

1.Scientists_______a lot of progress with that experiment over the last two years,but more work still needed,
A,made B.are making C.have made D.had made

C
over the last two years 在过去两年,显然是对现在有影响,用完成时.
But more work still needed,还有工作要做,没完呢,所以是现在完成时.

2.My parents began to get to know each other about 20years ago,_____they were still college students.
A.on which B.at which C.when D.where

C.when
about 20years ago ,那时候, 他们还是大学同学.
when 如果用which 要用at which time,

3.The girl's dream was to have a study,____she could read books on her own.
A,from which B.of which C.in which D.during which
C.in which

梦想有个书房, 在那里,可以读书.
自然是in