第I卷选择题（共70分）
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
