“Was it under the tree _________ you were away talking to a friend?” “Sure. But when I got back there, the bike was gone.
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A
that
B
where
C
which
D
while
推荐题目
 The scientist, __________ my father works, is about 50.
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A
on whom
B
to which
C
with which
D
with whom
The cost of sales makes up a large part of the prices that _____. 
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A
are paid for all products
B
all products are paid
C
for which all products are paid
D
for all products paid