单项选择题

Chickens kept in this way are not only tasteless as food, they also produce eggs which ______.

A．lack important fibres
B．lack important protein
C．lack important minerals
D．lack important vitamins
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单项选择题
In many homes the symbol of the spirit of Christmas is ______.
A．the Christmas tree
B．the Christmas song
C．the Christmas card
D．the Christmas present
单项选择题
The Christmas tree first set up in Britain was in ______.
A．1776
B．1841
C．1933
D．1843
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