According to the research of NCAR, if the concentrations were held steady at 2000 levels,
A. the ocean's capacity to absorb heat would decline.
B. the sea-level would keep on increasing.
C. the global average temperature would decrease.
D. significant climate change would not take place.
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He hardly knows a word of English, ______
A. didn't he
B. doesn't he
C. does he
D. has he
Weather permitting, the picnic will be held as scheduled.
A. 天气允许野餐按照日程安排进行。
B. 天气允许我们举行野餐。
C. 如果天气好，野餐会按日程安排进行。
D. 如果天气好，当日程安排进行时，野餐就会举行。
The theory they stuck to ______ true.
A. proving
B. proved
C. be
D. being
He ______ complaining about her being late as soon as she arrived.
A. set to
B. set out
C. set out to
D. set about
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