17．Animals traveling from one country to another have to follow laws，just as people do．They do not have to have passport（护照），but they have to obey other rules．Most countries have laws about animals coming into their countries．The laws were made to stop the spread of disease疾病）that animals carry．
Traveling animals include cats and dogs going with their masters on trips．Others are rare animals going to zoos．Some are birds and fish on their way to pet（宠物）shops．
Some animals can not go into a country unless their owners can prove（证明）that they have been vaccinated （为…接种疫苗） against certain diseases．Others must be studied carefully by animal doctors．
Sometimes animals must spend a month or more in a special place before they can enter a country．The animals are fenced in．There they are kept away from other animals until it is certain that they do not have a disease．Only the people who care for the animals can go near．
There are many different laws in each country．Anyone who wants to take a pet to another country should check with the government first．Law are made to protect（保护）both people and animals．
66．Animals that travel from one country to anotherB
A．must have passports like humans．
B．have to follow rules and laws
C．have to travel with their masters
D．must be fenced in a special place
67．The underlined word"rare"in this passage means"A"．
A．strong and beautiful
B．expensive but not beautiful
C．not often found easily
D．not be found everywhere
68．Why are some animals kept in a special place before entering a country？B
A．Their masters are trying to sell them．
B．They must be checked separately to prevent disease from being spread
C．They are waiting for the rules to be made
D．People don't want them to run about．
