4．
阅读短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
The
best time to collect green leaves is early in summer but not so early. The
months of June and July provide the best leaf samples (样本) but you can find great
leaf samples throughout the summer. To make a full colour collection, you have
to collect leaves in autumn. I have seen many beautiful fall colour collections.
When
you select leaves for your collections, try to select leaves of about the same
size and shape on the tree. Make sure you should collect the complete leaves.
Remember,
simple leaves have only one blade (叶片) or leaflet. Compound leaves have several or many
leaflets. You must know these two kinds of leaves. Good leaf collections
contain the entire leaf. That is a small part of the twig (嫩枝) with a lateral or terminal bud (芽).
When
you collect leaves in the field, you can place them between the pages of a
magazine to protect them. And then, press them as soon as possible before you
remove them from this magazine. You should dry the collected leaves carefully
before placing them in a leaf press. Finally, place them in a leaf press. You
should write down each leaf's name and these names should follow the leaves
until the exhibition comes.
