單項選擇題The girl sometimes has difficulty（）what the teacher says in class.

A.understand  
B.understanding  
C.to understand  
D.understood


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A.somebody  
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2.單項選擇題The garden（）while the Greens were away from home.

A.took good care of
B.was taken good care
C.was taken good care of 
D.was taking good care

3.單項選擇題The factory（）, bicycles a month.

A.turns into
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C.turns in  
D.turns out 

4.單項選擇題The electric fan has blown away the terrible smell in the hall,（）?

A.can't it 
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5.單項選擇題The dog was tearing the cloth（）its teeth.

A.with
B.by 
C.through
D.in