四、阅读对话，回答问题。

A: Hi, Mary!

B: Hello, Tom!

A: M ary, t his is my grandmother.

C: Welcome!

B: Who is he ?

A: He is Jack, my brother.

B: He is big.

A : This is my mum and dad.

D. Nice to meet you.

B: Nice to meet you too.

family ['fæməli] 家，家庭

(1) 根据上文内容，选择正确的答案。

      M ary, this is my ________.

      A. grandmother                                              B. grandfather                                   C. brother

      Jack is my ________.

      A. father                                                         B. sister                                             C. brother

(2) 根据上文内容，判断对错。

      Jack is b ig.                                                                                                                            (  )

      Nice meet you.                                                                                                                     (  )