_______cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.
#31691
A
While
B
When
C
Since
D
if only
推荐题目
The settlement is home to nearly 1,000 people, many of left their village homes for a better life in the city.
#33260
A
whom
B
which
C
them
D
those
There was a time_____we went to the country and stayed with the farmers there.
#34672
A
which
B
that
C
when
D
while
________ we know, the moon goes around the sun.
#32297
A
As long as
B
As far as
C
As much as
D
As soon as
She wanted to go to the disco, _____, her parents told her not to.
#34401
A
instead
B
but
C
however
D
while
