阅读理解。
Yesterday afternoon，it was very hot.Mr. Green with his family decided to go swimming.There was a new and large swimming pool near their house.It was free for the first week.So they wanted to have a try there.When they got to the swimming pool，they were told to read the notice first.
Swimming Pool Rules & Regulation
*The swimming pool is open from 8：00 till 22：00.
*Wear a swimming suit before using the pool.
*Take a shower before entering the pool.
*Don't smoke in the whole area.
*Watch your children all the time while swimming.
*Don't move the sun chairs or umbrella without permission(允许)．
*Diving(跳水) into the pool is not allowed.
*Stay away from the deep area if your swimming skills are not so good.
*People who have drunk，caught colds or who have skin diseases(疾病) can't enter the pool.
After reading the notice，the Greens were all very clear about what they should do and how they could keep themselves safe in the swimming pool.They enjoyed themselves there all the afternoon.
1．The Greens were told to __ __ first when they got to the pool.
A．go swimming B．read the notice
C．fill in the form D．buy the tickets
2．According to the rules，Mr. Greens should __ __ before entering the pool.
A．take a shower B．move to the sun chairs
C．smoke a lot D．send the children back
3．The rules tell the Greens NOT to __ __ when they swim in the pool.
A．watch the children all the time
B．wear a swimming suit
C．carry umbrellas with them
D．dive into the pool
4．From the passage，we know that __ __．
A．the swimming pool is open from 7：00 to 20：00
B．people can stay in the deep area if they can't swim
C．people who have skin diseases can enter the pool
D．the Greens family spent the whole afternoon in the pool