Modern science has given clear evidence ______ smoking can lead to many diseases.
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A
what
B
which
C
that
D
where
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Tom's first job was at a local restaurant in his early twenties，________he worked for seven years.
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where
B
when
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It seems that this medicine has a good effect on the patient, ________he may die in great pain.
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A
when
B
where
C
by which
D
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Bungee is an adventurous sport, popular with young guys, _____ courage matters more than strength.
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A
where
B
that
C
which
D
whose