read the text and answer the questions according to the text：6、 外贸代表团来中国做什么？

A、只有我们班的同学来参加我的生日晚会。

B、我们班的同学和几个中国朋友都来参加我的生日晚会。

C、我们班的同学和老师来参加我的生日晚会。

D、我没有中国朋友。

Fill in the blanks with the right words according to the text. （） The past 20 years have seen enormous changes in the lives and structure of families in Britain. The biggest change has been caused by _______.

A、The patients

B、The sales people

C、The doctors

D、The competitors

What advice is given to tourists according to the text?

A．Shellfish are prime dishes for tourists.

B．It is very risky to go for a swim in the Mediterranean.

C．The seafood dishes are very appetizing to take.

D．It is very dangerous to eat shellfish.