单项选择题

In 1984, President Ronald Reagan proposed that the United States construct a launch laboratory for a new era of space exploration.

A．probing
B．revenge
C．invasion
D．expansion
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单项选择题
No other newspaper columnist has managed as yet to of readership.
A．though
B．in spite of this
C．even
D．so far
单项选择题
The plainer a bowerbird's plumage, the more brightly it decorates its nest to attract a mate.
A．more spectacular
B．duller
C．flatter
D．more melancholy
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