单项选择题

-- Have you finished ______ the book-- Not yet. I'll try ______ it to you before Friday.

A． reading, returning
B． to read, to return
C． reading, to return
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单项选择题
Many people watched the boys ______ the mountain at that time.
A． climb
B． climbing
C． to climb
单项选择题
-- Where is Tom Do you know-- I think he ______ to the library.
A． has gone
B． has been
C． went
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