完形填空Now a lot of people like to keep dogs as their pets．But

完形填空Now a lot of people like to keep dogs as their pets．But do you know dogs were wild
Now a lot of people like to keep dogs as their pets．But do you know dogs were wild(野生的)animals long,long ago?
The 36 wild dogs were trained by 37 in Europe about 10,000 years ago．These first"dogs"were not like 38 we have now．They may have been small wolves．These dogs often came near humans to 39 some food．Some of the young dogs were adopted(收养)by people and grew-up with them．
　　Humans believed the 40 were a help to them in many ways．The dogs helped them to hunt(狩猎)．They could smell and hear danger 41 people could．They helped to keep people 42 on cold night．So it was 43 to raise the dogs.
　　Now,there are many different kinds of dogs 44 they may look quite different from each other．Dog trainers think there are more than 400 different kinds in the world．The number keeps increasing with new kinds．
Since those early days,humans and dogs have always been together,We should 45 them from now on because they are really our friends．
( )36．A．whole B,late C．1ast D．first
( )37．A．wolves B．eats C．humans D．students
( )38．A．where B．what C．when D．which
( )39．A．serve B．waste C．make D．steal
( )40．A．cats B．foxes C．wolves D．dogs
( )41．A．when B．after C．before D．as soon as
( )42．A．cool B．warm C．hot D．cold
( )43．A．useful B．useless C．easy D．hard
( )44．A．so B．and C．but D．although
( )45．A．protect B．kill C．hurt D．see

36 A
37 C
38 B
39 D
40 D
41 C
42 B
43 A
44 B
45 A