The archaeologists found gold coins and pottery in the lowest level of the site____ they reached three months ago．
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A
what
B
for which
C
that
D
to which
推荐题目
The old town has narrow streets and small houses ________ are built close to each other.
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A
they
B
where
C
what
D
that
The children, _____ had played the whole day long, were worn out.
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A
all of what
B
all of them
C
all of whom
D
all of which
The college has developed an on-line system ________students can choose their own professors.
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A
where
B
when
C
that
D
which