题目内容：

Do you have a smartphone? If so, there is a good way for you to learn English: listening to podcasts(播客)!

Podcasts are made by people from all over the world. You can find them easily on the Internet. There are all kinds of podcasts. Some are about music. Some are about interesting stories. Some are about language learning. Most of the podcasts are free, so you can choose what you are interested in and keep listening.

The other advantage(优点)of listening to podcasts is that you can do it almost any time. You can do it when you are walking to school, or when you are running in the playground. You can do it even when you are going to bed. In this way, your English will improve a lot before you know it.

If you want to improve your English by listening to podcasts, here is something you need to remember. First, do not listen to podcasts when you are riding a bike. That's too dangerous! Second, make sure the sound of your smartphone is not too loud. The loud sound is bad for your hearing.

1.The writer tells a way of learning English by         .

A. listening    B. speaking    C. reading    D. writing

2.We can find podcasts          .

A. in the book    B. in the library

C. on the Internet    D. in the MP3 player

3.According to the passage, there is(are)         advantages of listening to podcasts.

A. 1    B. 2    C. 4    D. 5

4.We should not listen to podcasts when riding a bike because it is           .

A. impossible    B. boring    C. difficult    D. unsafe