填空题

His recommendation that Air Force (investigate) ______ the UFO sighting was approved by the commission.

【参考答案】

(should) investigate
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填空题
It is no （）arguing about it ，because he will never change his mind.
单项选择题
A．$ 3.00.B．$ 4.00.C．$ 7.00.D．$ 10.00.
A．$ 3.00.
B．$ 4.00.
C．$ 7.00.
D．$ 10.00.
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