Which of the following actions cannot influence climate？
A. Physical actions on land and in the oceans.
B. Physical actions in the atmosphere.
C. Physical actions in the space.
D. Physical actions in the groundwater.
One's choice of a particular hotel is based on______.
A. how much one is willing to pay for a night
B. whether one is travelling on business or for pleasure
C. whether the hotel is in the central part of a city
D. how good the services of the hotel are
上述材料属于()。
A. 指示性通知平行文
B. 知照性通知下行文
C. 事务性通知平行文
D. 任免、聘用通知下行文
David Singer, my friend's father,______raised and educated in New York, lived and lectured
A. who
B. if
C. while
D. though
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