—______ will you leave for Beijing—In a week.
A. How soon
B. How long
C. How often
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"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
The train came to an abrupt stop, making us wonder where we were.
A. an uncertain
B. a slow
C. an unexpected
D. a smooth
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