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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A
as
B
what
C
which
D
who
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She’s in a hopeless situation, _____ we will keep a very close eye on.
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A
where
B
when
C
which
D
that
Experts found a large quantity of wall paintings, some of them_____ the Han Dynasty.
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A
dating back to
B
dated from
C
dated back to
D
dates from
On the other side of the street stand more than 180 houses, _______are in poor condition now．
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A
of which half
B
which half of
C
half of them
D
of them half
She came back with her two friends, .
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A
neither of them are doctors
B
neither of them is a doctor
C
neither of whom are doctors
D
neither of whom is a doctor
The photo often reminds me of the scene _____ we were kept reading and writing after school.
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A
on which
B
where
C
which
D
why