单项选择题

()his address, I can't send this book to him.

A．Not knowing
B．Knowing
C．Not know
D．N6t known

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单项选择题
Since last year, she () of the long distance.

A．have covered three fifth
B．have covered three fifths
C．has covered three fifths
D．has covered three fifth
单项选择题
Goodbye, Mr. Smith. I'm very pleased ().

A．to meet you
B．to have met you
C．meeting
D．having met you
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