单项选择题

It is said in some parts of the world, goats, rather than cows, serve as a vital ______ of milk.

A．storage
B．reserve
C．resource
D．source
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单项选择题
This light is too ______ for me to read by. Don t we have a brighter bulb somewhere said the elderly man.
A．mild
B．dim
C．minute
D．slight
单项选择题
Within two days, the army fired more than two hundred rockets and missiles at military ______ in the coastal city.
A．goals
B．aims
C．targets
D．destinations
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