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【单选题】
A: Merry Christmas! B: [填空].

The same to you
Thank you
I hope so
Merry Christmas!
【判断题】
A: A Merry Christmas and Happy New Year to you! B: The same to you!

正确
错误
【单选题】
I _____him the Christmas gift by mail because he came home during the Christmas holidays.

ought to have sent
couldn’t have sent
must have sent
needn’t have sent
【单选题】
It _________ at Christmas that John Smith gave Mary a handbag.

must have
may have had
might have been
will be
【单选题】
It _________ at Christmas that John Smith gave Mary a handbag.

must have
may have had
might have been
will be
【简答题】
(a, b)[a, b] = [填空].

【单选题】
Like Christmas,Chinese Spring Festival is also a festival for family___________.

reunion
event
surprise
meeting
【简答题】
若a|b,则(a,b)=[填空].

【简答题】
[a, b][b, c][c, a]=[ab, bc, ca]x[填空].

【单选题】
A: Are you following me? B: [填空]

Can you walk slowly, please?
Let me think of it.
Im afraid not.
Who knows?