Depression is the leading cause of suicide, __ __ in turn is the third leading cause of death among 15 to 24 year olds in the United States．
#93672
A
who
B
which
C
that
D
what
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Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.
#92420
A
since
B
after
C
before
D
when
My sister was very afraid all the way because it was the first time she ______ a car.
#92937
A
has driven
B
drove
C
had driven
D
is driving
His name was Tony and he seemed ____ like a human ____ a machine.
#92979
A
such； than
B
more； than
C
so； than
D
more； then
__________ these tips, and your time _______ doing research on the Internet _________ much worthwhile.
#92340
A
Following, will spend, is
B
Followed, spent, was
C
Follow, spent, will be
D
To follow, spending, has been