(2013·安徽，21)From space, the earth looks blue.This is ________about seventyone percent of its surface is covered by water.
#79357
A
why
B
how
C
because
D
whether
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I am afraid he's more of a talker than a doer, which is ________ he never finishes anything.(2011·山东)
#79317
A
that
B
when
C
where
D
why
You should be grateful to your employees, because you wouldn't be＿you are now without them.
#79345
A
why
B
how
C
where
D
which
The boss believed Tom's reason for being late for work is ______ he had to help his grandma cook.
#79482
A
why
B
that
C
where
D
because he
Although you have learned much knowledge and a lot of theories, the problem is _______ can be put into practice.
#79449
A
what you have learned
B
how what you have learned
C
that what you have learned
D
how that you have learned
—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.—Yes，we saw her mother was at the supermarket that morning.
#79364
A
why；that
B
which；that
C
that；because
D
why；because