The project required ten years of __diligent_

1Her father was a quiet man with __graceful__ manners．
A.polite
B.usual
C.bad
D.similar
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2The two banks have announced plans to __merge__ next year．
A.close
B.sell
C.break
D.combine
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3He __demolished__ my argument in minutes．
A.supported
B.disproved
C.disputed
D.accepted
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4Lower taxes would __spur__ investment and help economic growth．
A.attract
B.spend
C.encourage
D.require
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5I enjoyed the play-it had a clever plot and very __funny__ dialogues．
A.boring
B.original
C.humorous
D.long
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6He was kept in __appalling__ conditions in prison．
A.necessary
B.terrible
C.critical
D.normal
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7Solar-power satellites will use radio waves to beam energy down from space．
A.Right
B.Wrong
C.Not mentioned
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8Solaren is going to design 200 solar-power satellites．
A.Right
B.Wrong
C.Not mentioned
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9Space-based solar cells could collect solar power only when skies are clear．
A.Right
B.Wrong
C.Not mentioned
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10One advantage of space-based solar power system is that it is economical．
A.Right
B.Wrong
C.Not mentioned
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The project required ten years of __diligent__ research．