根据句意及首字母或者图片提示填空。
1. English isn't d_______ to learn, if you have an efficient method.
2. I like v_______ very much, for it is very fun.
3. Playing _______ is indeed really interesting. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200265.gif)
4. My sister has a ping-pong _______. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200902.gif)
5. _______ is young boys' favorite. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200172.gif)
6. We need a _______ ball, Dad! ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200815.gif)
7. Does your sister have a _______? ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200127.gif)
8. —Where is your pencil, Dave? —It's in the _______ on the desk. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200943.gif)
9. There are many _______ on the tree. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200766.gif)
10. His sister has two _______ They're very nice. ![](https://img.tikuol.com/uploadfile/2017/0513/20170513125200167.gif)