181.He has left his book here on_____,so that you can read it.
A.purpose B.intention C.aim D.meaning
[答案]A.purpose.
[注释]on purpose是介词习语，意为“故意地”。如用intention,则应说by intention故意地。
182.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
[答案]C.at random.
[注释]at random(=without aim or purpose)随便地，胡乱地：His clothes were scattered about the room at random.
By accident意外地；on occasion偶尔；on an average平均计算。
183.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
[答案]C.missed.
[注释]miss doing sth.没有做某事：I missed seeing the film when it was shown at school.(学校放映那部电影时，我没有能去看。)
184.His_____of the aeroplane was correct in every detail and could really fly.
A.shape B.pattern C.design D.model
[答案]D.model.[注释]model此句中意为“（飞机的）模型”。
185.If you_____your demand,then maybe you will have more chance of getting what you want.
A.conduct B.dismiss C.grant D.moderate
[答案]D.moderate.
[注释]moderate(=make or become less violent or extreme)节制，缓和，减轻。
