现在，网上购物正在被越来越多的消费者所接受。但是，由网上购物引发的问题也引起了人们的高度关注。清根据下表内容，用英语写一篇短文，分析网上购物的利与弊。

生词:  网上购物 online shopping (n.);

方便的convenient (adj.), convenience(n.)；        保证ensure (vt.)

注意：1. 内容应包括表格中的要点，并发表自己的看法；

      2. 词数100左右；

      3. 文章开头经给出，不记入总词数。

With the popularity of the Internet, more and more people prefer going shopping online because of its advantages.

 You should _______ any opportunities you have to practice English.

 Judging by her _______, Jane must be a southerner.

 Tim, ______ you ______ your homework yet?

 —Your food is very delicious!

—_______.

When we visited Hainan again ten years later, we found it changed so much that we     could hardly _______ it.

 John asked me _______ to visit his uncle’s farm with him.

Do you happen to know ________? 

 All of us found ______ difficult to work out the maths problem.

 ______ the terrible pollution, so many beautiful fish are fast disappearing in the river.