1、He has left his book here on _____, so that you can read it.

　　A. purpose　B. intention　C. aim　D. meaning

　　2、The magician picked several persons from the audience and asked them to help him with the performance.

　　A. by accident　B. on occasion　C. at random　D. on an average

　　3、The open university was started in order to help those who _____ having a university education when they were young.

　　A. stopped　B. failed　C. missed　D. ceased

　　4、His _____of the aeroplane was correct in every detail and could really fly.

　　A. shape　B. pattern　C. design　D. model

　　5、If you _____ your demand, then maybe you will have more chance of getting what you want.

　　A. conduct　B. dismiss　C. grant　D. moderate

　　參考答案&解析：

　　1、A. purpose.　[注釋]on purpose是介詞習(xí)語，意為“故意地”。如用 intention,則應(yīng)說 by intention故意地。

　　2、C. at random.　[注釋]at random(=without aim or purpose)隨便地，胡亂地：His clothes were scattered about the room at random. By accident 意外地；on occasion 偶爾；on an average 平均計算。

　　3、C. missed.　[注釋]miss doing sth.沒有做某事：I missed seeing the film when it was shown at school.(學(xué)校放映那部電影時，我沒有能去看。)

　　4、D. model.　[注釋]model此句中意為“(飛機(jī)的)模型”。

　　5、D. moderate.　[注釋]moderate(=make or become less violent or extreme) 節(jié)制，緩和，減輕。