单项选择题

The Space Age ______ in October 1957 when the first artificial satellite was launched by the Soviet Union.

A．initiated
B．originated
C．embarked
D．commenced
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单项选择题
The new secretary has written a remarkably ______ report only in a few pages but with all the details.
A．concise
B．clear
C．precise
D．elaborate
单项选择题
A budget of five dollars a day is totally ______ for a trip round Europe.
A．inadequate
B．incapable
C．incompatible
D．invalid
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