用正确的冠词a，an，the填空（不填则画“／”）。

1. I have _____ beautiful pen. _____ pen is blue.

2. It's_____dog.  Its color is _____ black.

3. _____ moon is big and bright (明亮的).

4.  This is _____ jacket.  It's _____ orange jacket.

5. Look at _____ boy.  He is _____ English boy.

卵巢肿瘤患者腹部X线平片显示牙齿或骨骼，最可能的诊断是（）.

A.畸胎瘤

B.纤维瘤

C.勃勒纳瘤

D.甲状腺瘤

E.内胚窦瘤