The cannabis originated in _________.
A. the Soviet Union
Britain
C. Leningrad
D. Afghanistan
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—______ will you leave for Beijing—In a week.
A. How soon
B. How long
C. How often
"Another's brass", as used in this selection, means _________.
A. borrowed money
B. the arrogance of some people
C. a special kind of metal used in building
D. ornaments worn by some women
点（1，2）是函数z=∣（x-1）（y-2）∣-2的（）
A. 极小值点
B. 极大值点
C. 最大值点
D. 间断点
I wonder who first _________ the idea of bags with gas to make balloons.
A. imagined
B. conceived
C. cherished
D. concealed
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