单项选择题

The practical use of radio waves brought about______.

A．new machines for planes
B．a radio directing and ranging device
C．new radio sets for RAF bombers
D．a discovering device
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单项选择题
What can be inferred from the news
A．Israel has agreed to recognize Palestinian rights.
B．Israeli Forces have withdrawn from Arab lands.
C．The US supported Israel in lifting the boycott.
D．The US objected to lifting the boycott against Israel.
单项选择题
Nigeria will return to the Commonwealth after______.
A．she has sentenced minority rights activists to death
B．the military has resumed control of the country
C．power has been handed over to an elected president
D．she has negotiated with Commonwealth leaders
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