单项选择题

A．and
B．carrier
C．while
D．within
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单项选择题
What was the author’s purpose when writing this passage
A．To give practical instruction for pruning a tree.
B．To give a gardener description of pruning.
C．To explain how trees develop disease.
D．To discuss different methods of pruning.
单项选择题
A．theB．one’sC．ourD．your
A．the
B．one’s
C．our
D．your
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