--Can I speak to Mr Smith, please?
--_________. He is giving a talk at a meeting.
A、IthinksoD
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TheGreatWallinChinaisoneofthefew_____objectsontheearth_____fromthemoon.
Pop music is _____ he likes most .
_____ seen ,it will never be forgotten.
Will it be_____ before the professor returns ?
I'm sorry I've forgotten to post your letter .
—Never mind . _____ post it myself .