Write a multi-choice question for the following article, with the given choices and answer: Article: In our daily lives, Wechat is really hot now. Many people express themselves, exchange ideas and deliver information by Wechat. There are a number of reasons for Wechat to be popular. To begin with, Wechat is a cheap way of communication, which cuts down a great deal of the cost made by phone calls. Next, Wechat is to the taste of the most of people. Its attractive and lots of functions are loved widely. What's more, convenience also leads to its popularity. It is _ no matter where we are. However, it has problems, too. First of all, our IDs might be revealed when we use Wechat and we could be in danger. Secondly, we may spend more time on Wechat instead of with our family. As a result, relationship could break down. The last problem is that our attention might be drawn too much and sometimes we may find it difficult to focus on study. There is no doubt that Wechat will improve as time goes by. So let's look forward to the better Wechat and have more fun with it. Options: A Express ourselves. B Exchange ideas. C Make phone calls. D Deliver information. Answer: C Make phone calls. Question:
Answer:
What can't we do by Wechat ?