a. 单词拼写：根据所给中文意思或首字母，写出各句中所缺单词的正确形式。(共5小题，每题1分，满分5分)

1. With your ____________(许可), I’ll leave now.

2. We give a 10% __________ （折扣）on cash purchases.

3. I have ________ （受益）a lot from reading different kinds of books.

4. For lack of food, the old man s______ to death.

5. It’s important to keep the b_______ of nature.

b. 完成下面的句子，每空只填一词。（共5小题，每题2分，满分10分）

6. 他们面对面地坐着，怒视着对方。

They sat face to face, _______ _______ each other.

7. 由于负债累累,他每天不得不加班工作。

   Being _____ _____, he has to work extra hours a day.

8. 你所说的使我想起了我悲伤的故事。

What you said ________ me ________ my sad story.

9. 除夕烧香祭祖是中国的社会习俗。

It’s the ____ ______to light incense in memory of ancestors at the Spring Festival Eve in China.

10. 请原谅我忘记了你的生日。

Please ______ me _______ forgetting your birthday.