问题

___________ his telephone number,she had some difficulty getting in touch with Bill.[ ]

A:Not knowing
B:Knowing not
C:Not having known
D:Having not known

正确答案是：

同类题型

It is not so __________ as yesterday, so there are__________ people sitting in the square.

sit in an office all day long and rarely _____,you’re likely to suffer from neck andback pains.

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What thewomen under the tree

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