单项选择题

They （） this boy for quite a few days before they found him.

A、 have looked for
B、 had looked for
C、 have been looking for
D、 had been looking for

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Be careful when you're driving （） the narrow bridge.

A、 across
B、 in
C、 through
D、 for
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Do you think he spilled the soup（）purpose so that he wouldn't have to eat it.

A、 for
B、 to
C、 in
D、 on
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