题目内容：

用括号所给词的适当形式填空，使句子意思完整。

1.The ground is covered with fallen          (leaf) in autumn.

2.Many young trees           (plant) in my country every year.

3.Students in our class have finished          (read) the text.

4.I overslept this morning. By the time I got to the train station, the train        (leave)

5.When the guest entered the hall, Mr. Smith stood up and greeted him              (polite)