I.单项填空(本题共10小题，每小题1分，共10分)。

　　从各题所给的四个选项中，选出可以填入空白处的最佳选项。

　　1.At primary school,I dreamed of being_____astronaut.

　　A.a B.an C.the D./

　　2.I often go to the cinema with my parents _____Saturdays.

　　A.at B.by C.on D.in

　　3.The boys in my class are interested in_____,especially ball games.

　　A.music B.science C.art D.sport

　　4.--Betty,_____do you start celebrating New Year in America?

　　--On December 31st.

　　A.when B.where C.why D.how

　　5.The Australians are like the English in many ways_____they have many British relatives.

　　A.if B.because C.so D.although

　　6.It's_____to throw away old things.Some of them can be reused.

　　A.normal B.dangerous C.wasteful D.necessary

　　7.The air is very clear today,so we'll_____the whole park from up the hill.

　　A.visit B.enter C.see D.cross

　　8.My friends are going to different schools,but I hope we will_____with each other.

　　A.go back B.grow up C.have a word D.stay in touch

　　9.The CD player will go wrong if you don't use it _____.

　　A.properly B.carelessly C.quietly D.clearly