单项选择题

It is desirable that the airplane ______ as light and fast as possible.

A．be made
B．is made
C．were made
D．has been made
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单项选择题
On the memorable occasion, the soldiers ______ the Colonel when he arrived.
A．shouted
B．solved
C．salvaged
D．saluted
单项选择题
Inasmuch as a year does not elapse without a certain number of villagers falling victim to the ferocity of tiger, its roar is ______ heard by the natives ______ feelings of terror.
A．not..., with
B．not..., without
C．seldom..., with
D．always..., without
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