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Cloning plants is straightforward           cloning animals is very complicated .
#34234
A
so that
B
although
C
while
D
as if
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A new study found ______ a teacher has anxiety about math, ______ feeling can influence how his or her female students feel about math.
#31312
A
when that; which
B
that when; that
C
that if; which
D
if that; that
Henry VII set a standard for ______ people were to speak English.
#34440
A
why
B
whether
C
when
D
how
Personally I prefer to stay up ______at night, but not ______I’ll have to drive to work the next day.
#34124
A
deeply, while
B
deep, unless
C
far, because
D
late, when
There were some chairs left over ________ everyone had sat down.
#30678
A
when
B
until
C
that
D
where
 How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?
#31247
A
unless
B
when
C
until
D
before