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-Two hundred of the tourists were saved from danger in Taiwan, but the rest stil

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—Two hundred of the tourists were saved from danger in Taiwan, but the rest ______ still missing.  
—If the travel agency ______ more safety measures, this accident could have been avoided.  [     ]A. is; has taken
B. are; had taken
C. were; had taken    
D. are; would take

试题答案

C