单项选择题

The author implies that the space age has （）.

A．weakened the reliability of reported sightings
B．increased the number of UFO sightings
C．allowed more scientific study of UFO’s
D．solved the age-old mystery of UFO’s

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单项选择题

What does spell in the last sentence of the second paragraph most probably mean（）

A．Write out
B．A period of time
C．A curse
D．Lead to

单项选择题

Women’s success in almost every field is significant because （）

A．women have fought very hard for success
B．women have to bear and rear children
C．women have never succeeded before
D．men still carry on the sex war