第78句：

The performance is said to be excellent and with a student's discount,the tickets will be really cheap.

六级词汇讲解:
该句需要注意be said to……的类似表达以及discount的用法。
be said to...的意思是“人们说”，这种用被动语态表示主动语气的表达方式，意在强调事情的客观性。类似的表达还有:
l)be supposed to…意为“人们期望”。如:
You are supposed to be here at nine.
你应该9点到这儿。

2)It is believed that…意为“人们相信”。如:
It is believed that二will definitely win the prize，
大家相信我们一定会得奖。

3)It must be admitted that…意为“必须承认……”。如:
It must be admitted that for the present we are inferior to our competitors in technical equipment.
必须承认，目前我们在技术设备上略逊于我们的竞争对手。
本句中，discount是名词，意为“折扣”。如:
They give a 10% discount for cash payment.
现金付款，他们给予九折优惠。

此外，discount还可以用作动词，表示“打折;认为……不重要，低估”。如:
1) The store discounted alI clothing for the safe.
该店服装全部打折出售。
2 ) His information is not to be discounted.
他的消息不可不重视。

六级考点归纳:
discount 作为名词，可以组成很多实用短语。如:
at a discount 折价，减价出售;低于面值的价格;不受重视
with some discount 打折扣;以保留的态度……
additional discount 额外折扣;折上折
cash discount 付现折扣，现金折扣
extra discount 额外折扣
special discount 特别折扣
volwne discount 总额折扣
heavy/small discount 大/小折扣
usual discount 普通折扣
wholesale discount 批发折扣