(2013·高考湖南卷)The university estimates that living expenses for international students________around $8,450 a year，which________a burden for some of them.
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A
are；is
B
are；are
C
is；are
D
is；is
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Millie’s eyes ________ dark brown and her hair ________ black.
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A
is; is
B
are; are
C
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The number of the people who can afford to buy their own house ______ more than 60%,but a number of houses _______.
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are; hasn’t been built
B
are; has built
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This is Susan and that is Mary. _ my _ .
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She's, friend
B
He's, friend
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The number of people who________ killed in the earthquake ______4000.
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A
was; were
B
were; was
C
were; were
D
was; was