(2013·高考新课标全国卷Ⅱ)Four and ________ half hours of discussion took us up to midnight，and ________ break for cheese，chocolate and tea with sugar.
#7983
A
a；a
B
the；the
C
不填；the
D
a；不填
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He was ______ medical student before he turned _______ engineer.
#10004
A
a; an
B
the; the
C
a; /
D
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I remember seeing this kind of _______ product in _______ city of Shanghai, which is known as _______ Paris of the East.
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the; the; the
B
/; the; the
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Having received___________ training of the MS. Company, he was offered important position in management.
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the;an
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不填;an
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Some researchers are finding that daydreaming may be important to ______ mental health and it is ______ good means of relaxation.
#8767
A
the; 不填
B
不填 ; the
C
不填; a
D
不填; 不填