The project alongside with the experiment we had once devoted so much time__________ perfectly.
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A
to work out
B
to working out
C
to worked out
D
has worked out
推荐题目
_____ in Paris, the Louvre is one of the world’s largest art galleries. 
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A
Locating
B
Located
C
Having been located
D
Being located
The teacher said he needed _____ boys besides his students _____ the classroom. 
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A
20 other; clean  
B
20 more; to clean
C
20 more; cleaning
D
another 20; clean
—Would you permit me ___________ here?— Sorry. We don’t permit ___________ in the lab.
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A
smoking; smoking
B
to smoke; to smoke
C
smoking; to smoke
D
to smoke; smoking