单项选择题

Which of the following is the world's smallest continent

A．Asia.
B．Australia.
C．Europe.
D．Afric
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单项选择题
The celebration of Thanksgiving Day has been observed to thank ______.
A．God
B．their ancestors
C．their parents
D．the pilgrims
单项选择题
Which of the following words has most morphemes
A．Undertake.
B．Undesirablity.
C．Pickpocket.
D．Announcement.
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