(15)free of charge不收费
(16)be all sold out /out of stock售空
(17)avoid being cheated 避免受骗
(18)bargain with attendant和服务员砍价
(19)effective and convenient 高效率、方便
(20)complain to sb about sth就某事向某人投诉
☆专题练析
基础写作：介绍网上购物的优缺点
随着电视和网络的普及,人们的购物方式也发生着变化,下表是你班的同学对网上购物的认识。请根据以下表格内容写一份报道,介绍网上购物的优缺点。
|
优点 |
缺点 |
|
足不出户,高效率、方便 |
要花额外的费用 |
|
可以不费力气地进行比较 |
不完善的支付系统 |
|
可供选择的货物多 |
不适合消费者购买急需的产品和容易买到假货 |
It is effective and convenient for you to do some shopping on the net because you needn’t go out of your home. Besides, the large varieties of goods on the net are effortlessly comparable and easy to choose. However, you have to spend extra money on the goods. And sometimes the incomplete payment system will result in revealing your personal information, which is not safe. What is more, it is unsuitable for consumers to purchase the goods in eager demand on the net.
读写任务：购买衣服的经历与建议
［写作内容］
1. 以约30个词概括短文的要点；
2. 然后以约