New Words：

cliff [klif] n. 悬崖, 峭壁
nightmare ['nait.mer] n. 恶梦；梦魇；极其糟糕的情况

Sample Sentences：

It's almost impossible to climb up the cliff.
There are very few holds on the cliff face.
I have nightmares about falling off a cliff.
Her first few days in that foreign land were a total nightmare.

New Words：

zip wire 滑索
pulley ['puli] n. 滑车, 滑轮, 皮带轮

Sample Sentences：

Have you tried the zip wire before?
What do you do with a zip wire?
You slide down the rope with the help of a pulley.
A pulley is made from wheels and rope. With the pulley, we can pull things easily.

New Words：

slip [slip] v. 溜；滑倒；滑脱；溜走

Sample Sentences：

The fish slipped out of my hand.
The student slipped out of the classroom.
I grabbed him, but he slipped from my grasp.
He caught the ball, then it slipped through his fingers.

New Words：

grasp [grɑ:sp]
v.抓住；理解；领会；抓紧
n.紧抓；紧握；控制；领会

Sample Sentences：

The little girl grasped her mother's arm.
Grasp my hand and I'll pull you over the wall.

They have a good grasp of foreign languages.
He let the ball slip through his grasp and into the net.

slip [slip] v. 溜；滑倒；滑脱；溜走

New Words：

opportunity [ˌɔpəˈtjuːnəti] n. 机会；时机

Sample Sentences：

You must grasp this opportunity.
It's a pity he missed the opportunity to travel abroad.
You'll have the opportunity to ask any questions at the end.
I'd like to take this opportunity to thank my classmates for their support.

grasp [grɑ:sp]
n.把握, 领会, 抓紧
vt.领会, 抓住, 紧握