单项选择题

My sister must have forgotten （）gasoline in the car

A. to putting 
B. to have put
C. putting  
D. to put

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I can't remember （）received an email from Robert lately

A. had    
B. have
C. having   
D. to have
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The company tried （）reasonable financial goals for the New Year

A. set    
B. to be set
C. to set   
D. being set
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