用am，is或are填空。

1.That's my father and this        my mother.

    They        my parents.

2.This is my friend and that        my sister.

3.  —_      she your sister?

    —Yes.she        .

4.—       he your brother?

   —No. He        my friend.

5.—          Guo Peng your brother?

   —Yes, he        .

6. I       his friend and he         my friend.

7. —         you Jack's brother?

    —No, I'm not.

8.These          my parents and those          my grandparents.

患者女，40岁，因“右肩锁部痛、恶心呕吐、心悸、胸闷”来诊。环指经常麻木（明显），晚上有时症状加重，疼痛不能入睡。检查结果：颈椎曲度反张，第1～2颈椎、第4～5颈椎、第6～7颈椎椎间小关节移位，第3～4颈椎、第4～5颈椎、第6～7颈椎椎间孔变小，确诊为颈椎病。

颈椎病的临床表现包括（）

A.颈肩痛

B.头晕

C.上肢麻木

D.肌肉萎缩

E.行走困难，甚至瘫痪

F.头痛