While he was in the office he preferred_____something____nothing.

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A. to do, than to do   B. doing, than doing

C. doing, to doing　　 D. to do, to do

They____________as they were passing through the town.

[    ]

A. dropped in on us   B. droped in on us

C. dropped on us　　  D. dropped in us

______ that he is not to be trusted.

[　　]

________ he realized it was too late to return home.

[　　]

______ had I finished my translation when the class was over.

[　　]

On the Wall ______ two large portraits.

[　　]

______he might, Tom could not got out of the difficulty.

[　　]

______the rain stop, the crops would be saved.

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Now _____ your turn to recite the text.

[　　]

______, I will not buy it.

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