单项选择题

It seems oil ______ from this pipe for some time. We'll have to take the machine apart to put it right.

A. had leaked
B. is leaking
C. leaked
D. has been leaking
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______ the water left in the kettle, the doctor put several things he unwrapped from a handkerchief.
A. At
B. To
C. Within
D. Into
单项选择题
In spite of the ______ economic forecasts, manufacturing output has risen slightly.
A. gloomy
B. miserable
C. shadowy
D. obscure
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