As is known to us all, _____ tiger is in _____ danger of becoming extinct.

A. the, a  B. the, 不填 C. a, 不填       D. 不填, the

 As is known to us all, _______ is ______ European country.

A. Germany; an     B. German; an      C; Germany; a    D. German; a

As is known to us, knowledge is     can change your life.

         A．that              B．what      C．which            D．how

以下是一些夏令营活动的简介：
A．Cedar Ridge Camp
Cedar Ridge Camp provides a traditional camp experience for boys aged 6-16.The Camp offers a safe and friendly  environment where children will develop physical skills. At Cedar Ridge Camp children learn to live comfortably with one another in an outdoor
environment.Cedar Ridge campers will have the opportunity to enjoy horseback riding，swimming，and hiking.
B．Camp Chipinaw
Chipinaw has long been known as a family style camp. Parents can take part in our camp with their children  during the summer vacation.A lot of activities are offered allowing parents and their children to improve their relationship and make them better understand each other.
C．Astrocamp
In one week be prepared to explore space，train like astronauts in our campsite(露营地)，climb rock on Mars, and more！Astrocamp has more to offer than its programs.  Our returning campers will tell you why they come back, for the fun and to see the friends they have made.
D．Camp Rockbrook
Since 1921，Rockbrook Camp for children has been a place where boys and girls aged 6-16 can experience the wonder and excitement of a summer.Our overall program encourages children to gain self-confidence and experience in making their own decisions. Our goal is for each camper to gain a deeper understanding of himself/herself.
E．Kettleby Valley Camp
Kettleby Valley Camp offers our campers all kinds of activities in which all the campers will
be interested.Our campsite lies in the big valley in a famous and beautiful mountain.During camp time，we will have competitions of Rock climbing，mountain bike cycling，mountain climbing and so on.We’re sure our campers will have an exciting and unforgettable summer!
F．Chestnut Camp
Chestnut offers boys and girls a facility(场所)along with creative day and evening
programming.Chestnut Lake is a traditional camp with a strong sports program.The new   facilities include：Olympic size pool，indoor basketball court，theater arts center，outdoor adventure course, gymnastics center and some other sports buildings.
下面是想参加夏令营的人员的有关信息，请根据这些信息匹配适合他们的夏令营：
【小题1】Mr.and Mrs.Black have a son，Jack，who is now 15 years old.As is known to us，boys of this age of ten can’t get along well with their parents.Sometimes he can’t understand his parents and therefore he often quarrels with his parents，which makes his parents heart broken.In order to improve their relationship，they decide to take part in a camp together with their son this summer.
【小题2】Tom is a boy of fourteen who loves sports very much.His favorite sport is basketball and he is now on the basketball team of his school.Since summer vacation is coming，he’d like to join a camp where he can have chances to play basketball with other boys.He also wants to take part in other physical activities.
【小题3】Jane is a lovely girl who is now twelve years old.Although she does well in her studies，she is lack of self?confidence and sometimes she can’t make her own decisions.In order to change her，her parents plan to let her join a camp during the coming summer vacation.
【小题4】Mike is a brave boy of fifteen who likes adventurous  activities in mountains.His dream is to become a  mountaineer and stand on the top of the highest mountain when he grows up.He asks his parents to allow him to  take a camp this summer vacation where he can improve his skills of mountain climbing.
【小题5】Lily is a 19?year?old girl who is now studying astronomy in a university. Her dream is to fly to space like an astronaut.  In order to know more about space and make some new friends who have the same interest with her，she decides to  go to a camp during the summer vacation.