participate in the discussion n. participant 参与者

participate in sb's sufferings 分担某人的痛苦

8. guarantee vt. 保证；担保

① guarantee sth Nobody can ~ great success.

② guarantee sb. sth. ~ you free entry 保证你免费入场

③ guarantee that...... We can't ~ that our flights will never be delayed.

④ guarantee to do We ~ to deliver your goods within one week.

n. 保证；保修（期） under ~ 在保修期内 a year's ~ 一年的保修期

I give my ~ that he'll be here tomorrow. 我保证他明天会在这儿。

　　固定搭配: be guaranteed to do 肯定会做；必定会做

　　 If we try to keep it secret, she is guaranteed to find out.

　　〖练习〗 Working hard is not only a ______ of great success, but is among the essential requirements.

　　 A. sign B. signal C. guarantee D supposition

9. instruct vt. ① 教授；指导 instruct sb. in n. ~ us in math

②指示；命令 instruct sb. to do. ~ the pupils to come into the gym

③告知；通知 instruct (sb.) that

We have been ~ed that a decision will not be made until next Monday.

n. instruction U 讲授，教育 receive ~ in skiing give ~ in English

C 命令，指令 follow ~s 服从指示

give sb. ~s to do sth. = instruct sb. to do sth 指示某人做某事

n. instructor 教师；指导者 adj. instructive 有教育意义的

10. take on 雇用；承担（工作，责任）；呈现，显现；接纳（顾客），装载；变得风行，被大家接受

~ a new secretary ~ a new look ~ the responsibility

The bus can take on more passengers. 这车可以载更多的人。

The fashion for long skirts didn't take on for a long time. 长裙的时尚已经很长时间没有