Cloning plants is straightforward cloning animals is very complicated .

Cloning plants is straightforward           cloning animals is very complicated .

#34234

so that

although

while

as if

推荐题目

It has come to my notice _______ some of you have missed classes.

#34638

what

which

that

when

Wang Pin is an orphan.He has no dad ___ mum.

#80408

and

but

At the party the host presented an award to ______ took part in saving the drowning child.

#32708

whomever

whom

who

whoever

I can’t tell which is better, ________ I am a green hand．

#34252

but

for

Martin drove along ______ he found a convenient parking place．

#31588

after

when

until

since

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