The famous reporter, who is said to go back to America next month, _____in China for almost twenty years. 
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A
lived
B
was living
C
has lived
D
had lived
推荐题目
 Up to now, our society ________ with limited living space and a shortage of natural resources.
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A
has been challenged
B
is being challenged
C
is challenging
D
has challenged
Years of fighting have ______ the area ______.
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A
remained; in ruins
B
left; in ruins
C
remained; in ruin
D
left; in ruin
— Alvin,are you coming with us?—I'd love to,but something unexpected ________.
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A
has come up
B
was coming up
C
had come up
D
would come up
Barrack Obama __________ President of the United States since 2010.
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A
became a
B
has become a
C
has turned
D
has been