《食品安全法实施条例》规定，餐饮服务许可的有效期为几年：（）A、一年B、二年C、三年

Boys and girls, this summer vacation is the time for you to prepare(准备) yourself for the future. The following is some advice on how to have a wonderful vacation.
Exercise. You have worked hard most of the time. So you need to join in outdoor activities. They can bring your whole body into action. You can benefit(受益) from different kinds of exercise such as swimming, running and mountain climbing.
Learn some life skills. One day, you will live alone. You can’t depend on your family any longer. So, you should learn to cook, wash and other skills.
Go for a journey. Travel to places of interest. In this way, you’ll understand cultures that are different from that of your hometown. Beautiful sights can also make you relaxed.
Enjoy family time. Don’t always sit in front of a computer alone. It’s great fun for you to spend time with your family.
If you follow the advice above, your summer vacation will be filled with joy and success.

Advice	How to  小题1:
Exercise	You should take part in   小题2:. You can swim, run and go mountain climbing.
Learn some life skills	You will live alone and 小题3: yourself one day. You should learn to cook, wash and other skills.
Go for a journey	Travel to places of interest. You will understand   小题4:  cultures.
Enjoy family time	You shouldn’t always sit in front of a computer alone. You will have great fun   小题5:  with your family.