(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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Here _____a set of keys.The keys _____Bob’s.
#43754
A
is,are
B
are,is
C
is,is
D
are,are
_____number of the students in our class ______ 40. _______ number of them ______ sporty. 
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A
The , is; The, are
B
The, are; A, is
C
The, is; A, are
D
A, are; The, is
 Greatly moved by the movie, __________.
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A
tears came to the audience’s eyes
B
the audience could hardly hold back tears
C
tears could hardly be held back
D
the audience’s eyes were filled with tears