单项选择题

Now there are sophisticated tests which can______ poisons in the tiniest amount not even enough to kill a mouse.

A．discern
B．ascertain
C．detect
D．locate
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单项选择题
Because American parents believe that knowledge leads to a meaningful life, they try to give youngsters many opportunities to develop skills and______ interests.
A．worth
B．worthy
C．valuable
D．worthwhile
单项选择题
At the last committee meeting, the motion that the sale of the alcohol______ unlawful was defeated.
A．was made
B．was to be made
C．be made
D．would be made
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