Leading-in

Task Ⅰ　Describe the following pictures，and share your ideas about safety problems with your partners.

It's been four years since the flight vanished en route to Beijing from Kuala Lumpur on March 8，2014.What happened to the Boeing 777 and 239 people on board，including eight Australians remains one of the world's greatest aviation mysteries.There are the families of the 239 people out there that at the moment still do not have an answer to what happened to their loved ones.

Task Ⅱ　Translate the following proverbs into Chinese.

1.One's meat is another one's poison.

2.An apple a day keeps the doctor away.

3.Late better than never.

4.Please fasten your seat belt.

5.The opening of the Internet put consumer's payment safety in danger.