Mark Twain worked for several years as a pilot on a steamboat, taking passengers up anddown the Mississippi, the great river ___flows from the north of the US near the Canadianborder.
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as
B
what
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which
D
who
推荐题目
Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ___________ we should deal with properly.
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A
as
B
that
C
which
D
where
In many countries, government reports, legal papers and most business letters are the main situations _______ English is used.
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A
that
B
when
C
which
D
where
The way ____ he spoke English is more like that of an American.
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which
B
how
C
in which
D
in that
He is the only one of the students in our grade who ___ a winner of scholarship for three years.
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is
B
are
C
have been
D
has been
Gone are the days ________ we spent together in the mountainous village.
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when
B
that
C
where
D
on which