单项选择题

In 1970, if the cost to produce one widget was $0.07, what would have been the total cost to produce the number of widgets sold during that year？（）

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多项选择题
Long considered one of the most beautiful of the planets, Saturn has rings that scientists believe (i) the wreckage of scattered moons, but that is partially just (ii) as, so far, no spaceship has been able to bring any ring material specimens back to Earth.（）

A. consist of
B. revolve around
C. resulted in
D. experimentation
E. speculation
F. vacillation
单项选择题
In 1990, the total revenue for widgets sold was about how many times as great as the number of widgets sold？（）

A．3
B．10
C．65
D．98
E．120
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