(2)He slipped out when nobody was .

(3)While walking in the street，you should the cars.

(4) ！The snake is poisonous.

(5)She said all must the election process.

4．Special discount before the 22nd so the sooner the better!

22日前特价，越早(订票)越好！

[归纳拓展]

discount n．折扣，减价；v.打折扣；不重视

at a discount打折

discount price折扣价

注意：discount指某物减价出售时所减去的百分比。中文"折扣"意为扣除所减之百分比后余下的百分比。换句话说，中文说九折，英文是10% discount。

[语境助记]

(1)We give a 10% discount for cash.

现金付款，我们给予九折优惠。

(2)The store discounted all clothing for the sale.

该店服装全部减价出售。

[题组训练]

(1)单句语法填空

①One of the benefits mentioned in the advertisement is discount on any course at Tanya Language School.(2015·福建)

②The store promised (discount) prices at 10%.

(2)单句改错

They are selling old­fashioned clothes at discount.

5．Bigger dolphins can measure four metres in length...

更大的海豚长达四米......

[归纳拓展]

measure vi.&vt.测量，衡量；估量；n.尺寸；措施；程度

a measure of...测试(判断)......的方法

take measures/steps/action to do sth.采取措施做某事

make sth.to one's measure量身定做

in some measure在某种程度上

[语境助记]

(1)In a society that tends to measure everything in terms of dollars and cents，we learn from a