47.A.over                                   B. during                      C. at                                   D. on

46.That                               B. There                       C. This                         D. It

45.though                            B .as                            C. so                            D. until

44.help                                B. let                           C. make                       D. show

43.A.good                           B. better                       C. best                         D. the best

42.A.themselves                   B. their own                 C. theirs own                D. their own's

41.A.all                               B. any                          C. some                        D. both

40.Tom,you           on the phone.

A. is wanted                 B. are wanting                  C. want                    D. are wanted

（A）

All over the world people swim for fun. Swimming is enjoyed by people of  41  ages, from the very young to the very old. There are many places for people to swim in swimming pools. Many schools, hotels and clubs have swimming pools. Some people have pools of 42  in their yards.

Swimming is one of  43  forms of exercise. It can  44  hearts and bodies strong. It can also help blood circulate（循环）.Handicapped people can keep their bodies in better condition by swimming  45  they can't enjoy sports.

        46  is a good idea for parents to see to it（务必做到）that their children learn to swim 47  an early age. So their children will  48   it for the rest of their lives.

There are many rules for water safety. These rules can help save not only life  49  the life of a friend. First of all, know  50  .Many schools  51 swimming lessons to children. Adults（成人）can learn to swim at public pools.  52 rule to remember is never to swim  53  .Always swim with a friend and know  54  in the water at all times. It is best to swim  55  in safe places if you are beginners. If every one learned to swim and obeyed the rules for water safety, most drawing（溺水）could be avoided.

39.-Excuse me, may I take a seat here?

-             .The man on the seat has left.

A. you'd better not.        B. No, thanks.             C. Yes, Please.                  D. I'm afraid not.

38.Many people went to the concert  last night,         young people.

A. hardly                     B. probably                  C. mostly                     D. won't