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

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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
单项选择题
If you want(), you should speak slowly and clearly to the listeners.

A．to be understood
B．to understand it
C．understanding
D．to understood
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