Hong Kong has about 40 public(公共的) beaches.  Some of the beaches are among the best in the world. People can go there for a swim. You can go to most of them by bus. To go to some beaches, you must take a boat. There are toilets, changing rooms and places to buy food and drink on most of the beaches. You will swim there without er if you remember these instructions: 1. Never swim alone. 2. Never swim after a meal or when feel hungry or tired. 3. Do not stay in the water too long. 4. Never go out in a boat if you cannot swim. Remember: A red flag (旗帜) means that it is erous for anybody to go into the water. A blue flag means that it is erous for children. 小题1:There are _______ public beaches in Hong Kong. A. about forty   b. about fifty      C. about thirty     D. about twenty 小题2:We can get to ________ by bus. A．all the public beaches B．a few public beaches C．many public beaches D．most of the public beaches 小题3:It’s erous for children to swim when you see ________. A．a red flag B．a yellow flag C．a blue flag D．an orange flag 小题4:When you see a red flag, you know that __________ there. A．women should not swim B．children should not swim C．nobody should swim D．anybody can swim 小题5:The passage mainly tells us _______ in Hong Kong. A．the public beaches and swimming B．the er of swimming C．the best beaches D．the difficulties to go swimming