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 prunin

<上一题目录下一题>

热门试题

单项选择题

Why should pruning be done

A．To make the tree grow taller.
B．To improve the shape of the tree.
C．To get rid of the small branches.
D．To make the small branches thicker.

单项选择题

Why is a special substance painted on the tree

A．To make a wound smooth.
B．To prevent disease entering a wound.
C．To cover a rough surface.
D．To help a wound to dry.