阅读理解。

    Hong Kong has about forty public beaches. Some of them are very famous around the world. People can

go there for a swim. You can go to them by bus. To go to some beaches yu must take a boat.

    You will swim there without danger if you remember these instructions: 

     ●Never swim alone.

     ●Never go out in a boat if you cannot swim.

     ●Never swim after a meal or when you feel hungry or tired. 

     ●Don't stay in the water too long.

     Remember: A red flag means that it is dangerous for anybody to go into the water.A blue flag means that

it is dangerous for children.

根据短文内容，判断下列各句正误。正确的在题前括号内写“T”，错误的写“F”。

( )1.There are about 40 public beaches in Hong Kong.

(     )2.You should swim after a meal.

(     )3.You can take a bus to go to most of the public beaches.

( )4.You'd better swim when you're alone.

( )5.If you were a child, you could swim when you saw a erd flag.