冠词填空;在下列句子中空白处填入适当的冠词，不需要的画×

1.I am___an___active girl.I speak and laugh loudIy in__x____classroom,like__a____boy.

2.It is evening.__An____old cock is sitting in___a___tall tree.___A__fox comes
to__the____tree and looks up at___the___cock.

3.She saw___a___dictionary on___a___table in her room.

4.___x___Changjiang River is___the___longest river in China.

5.These___x___books are Tom's.There are some____x__bookmarks in his books.

6.__x___Teachers'Day is at___the___beginning of__x____September.

7.They often go to play____x__basketball after.

8.At____x__first we go to school by___x____bike.