2 . 每本书的后面是一个人，人的后面是一个种族，种族后面是自然和社会的环境。
Behind every book is a man, behind the man is the race, and _______ _______ _______ _______the natural and social environments.

3 . Behind every book is a man, behind the man is the race, and__________________________(这个民族背后是自然和社会环境). (根据汉语提示完成句子)

4 . The tunnel project has already fallen________ schedules. (用适当的词填空)

6 . 事实上，你在荧幕上看到的电影是大量艰苦工作的产物，其中大部分工作发生在幕后。
Actually, the film you see on the screen is the product of a huge amount of hard work, most of________ takes place________ the scene.

7 . 她就在我后面，是吗?(用反义疑问句)(汉译英)

8 . I was looking at the photos on the noticeboard when I heard a voice behind me.(英译汉)

9 . The difficult exercise was ________ the abilities of most of the class, making us upset.

A．beyond

B．besides

C．behind

D．below

10 . We left in a hurry and I must have________(忘了拿钥匙). （根据汉语提示完成句子）