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. The library’s study room is full of students _______ for the exam.
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A
usily prepared  
B
usy preparing  
C
usily prepare  
D
re busily preparing
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Can you imagine what difficulty he had ____ the work?
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to do
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do
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doing
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1 would like it_______ by credit card，may I?
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to pay
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pay
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    hardly made Allen pay any attention to correcting his mistakes.
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scolding
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George Gould, a friend of Carnarvon’s, went to Egypt after hearing of his strange death and visited the tomb, only ______a high fever the next day.
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catching
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to catch
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The snake had no choice but ___ down and sleep.
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A
lie
B
to lie
C
lay
D
to lay