单项选择题

Talks on climate change resumed in the German city of Bonn on July 16 to combat global warming.()

A. focus on
B. settle down
C. fight against
D. sum up

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He inquired whether it was possible to leave his suitcase at the railway station.()

A. insisted
B. suggested
C. asked
D. called
单项选择题
Light rays are turned aside by the intense gravitational field surrounding a black hole().

A. heightened
B. deflected
C. rotated
D. created
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