Such habits as smoking and cheating, once________, are hard to get rid of.[

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Such habits as smoking and cheating, once________, are hard to get rid of.[     ]
A. forms
B. forming
C. having formed
D. formed

答案

举一反三

When he came back,  he found the bag he had________over the seat was gone.[      ]
A. left to hang
B. left hanging
C. left hung
D. to leave hanging

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________ to his research work, the professor cared little about any other things.[     ]
A. Devoting
B. Devoted
C. Having devoted
D. To devote

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Contrast may make something appear more beautiful than it is when________alone.[      ]
A. seen
B. is seen
C. to be seen
D. having been seen

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I could hardly recognize her at the first sight because she was________in such a large skirt and
________sunglasses.[     ]
A. dressing; wearing
B. wearing; dressed
C. dressed; wearing
D. worn; wearing

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After many years of hard work，his dream was finally________.[     ]
A．come true
B．realizing
C．coming true
D．realized

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