A．have been B．is going C. are going D．have gone

4. Upon reaching the top of the mountain , a feeling of happiness and a sense of achievement will be experienced.(on page 42 ,line 11-12)

1)upon prep．在......后立即，一......就......．on以代替upon

Upon reaching the hotel, she e-mailed her father .

她一到旅馆就给她父亲发了电子邮件：。

②Upon his arrival at the airport，he was arrested by the police．

他一到达机场就被警察逮捕了。

upon／on

用作介词时，这两个词都可以表示位置，"在......上"的意思。二者在多数情况下可通用，但有下列区别：但有下列区别：

(1)on表示触及或构成某个表面的一部分，或者表示"由

......支撑"，"附在......上"的意思。

①There is are adding lamp on the desk．书桌上有一盏台灯。

②He stood on one foot ．他单脚站立。

③She has some thing on her mind ．她有心事。

(2)表不日期时一般只用on，不用upon。

On Sunday在星期天

On the fifth of April在四月五日

(3)upon属于比较正式的用语，在某些习语中，upon与on 不能互相调换。 Upon my word我发誓

once upon a time从前

depend upon it . 没错

①The Spring Festival will soon be upon us ．春节即将来临。

②You've hit the nail on the head ．你说到点子上了。

(4)在句末或分句末的动词不定式后往往用upon而不on。

There are enough chairs for everyone to sit upon ．

有足够的椅子让所有人坐着。

2)sense n ．感觉，辨别力，观念，意识

be out of one's senses 神智不清

come to one's senses 神志恢复正常

common sense: 常识； in a sense：在某种意义上； make sense：讲得通，有意义

There's no sense in doing sth：(做某事)没有道理

a sense of honor／humor／justice 荣誉／幽默／正义感 │

　e.g. You have no sense of economy ．你没有经济观念。

　　　What impressed me most is that he has a good sense of humor．

　　　In a sense，you have nothing to do with the matter at all ．

　Exercise:

　　你和他讨论这个问题没有意义。

_______ _______ _______ _______ _________arguing with him about the matter ．

5.The sense of touch is passed on the fingertips via thousands of sensors in the gloves. ( on page 42 line 20-21)

pass on... 把......传给......