45．A．healthy   B．unhealthy  C．healthily D．health

  44．A．when      B．where     C．what       D．why

  43．A．doing     B．making    C．having     D．playing

  42．A．by        B．with      C．in         D．on

41．A．animals   B．pets      C．persons    D．plants

    Wild animals can take care of themselves．But 41_ need special care．  You can 1earn much about animals  42_ taking care of a pet．Owning a pet is almost like  43_  a patient (病人)．You must think about  44  your pet  needs．You have to give it food and water  and a safe home．You must teach your pet and love your pet．If you do all these things well．you will have a  45 pet．

    Some people like dogs best．They give them food and water and a  46 to sleep in．Dogs love to take walks．Most dogs can learn tricks，like fetching a ball or rolling over and  so on．

    Most children like cats best．They _47 playing with them．Cats like 48 _ very

 much，so they spend most time on sleep．Since people regard(看作)them as pets，they hardly have to look for anything 49  ，  50  some of them are scared of mice．

40．一Which sign can you probably see in the library?

39．--Who do you think you'd like____with you，Tom or Mary?

     --Either is OK．

A．to ask go    B．asking to go

C．ask go       D．to ask to go

38．--What's the trouble with your sister?

      --She can't decide if she____do further study in America，leaving her son alone

      at home．

A．will be able to   

B．are able to

C．would be able to

D．be able to

37．_____French you practice speaking，_____progress you'll make．

A．The more，the great   

B．Much，great

C．The more，the greater

D．The most，the greatest