____________ no doubt that 100 years ago animal testing was cruel but today animals in experiments are very well taken care of.
#94079
A
It is
B
There is
C
This is
D
That is
推荐题目
When he was a little boy，he ______ on the farm.
#94738
A
used to working
B
used to work
C
got used to work
D
was used to work
----- Do you know when Tonny came back last night? ----- Yes. It was not yet nine o’clock _____ he came back home.
#92986
A
before
B
when
C
that
D
until
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
#92433
A
since
B
after
C
before
D
when
My father moved to Hainan in _____, when he was in ______.
#92996
A
the early 1990s; his thirties
B
early 1990s; his thirties
C
the early 1990’s; his thirty
D
early 1990’s; his thirty