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根據對話內容， 在方框中選擇適當的句子補全對話。（5分）

（ Kangkang: K　　　　　 Michael: M　 ）　

M：What are you doing?

M：What’s the matter with it?

M：Well, are you sure you plugged it in?

M：You’d better ask our computer teacher for help.

M: Don’t worry. He’ll be glad to help you.

根據下列短文內容，在短文后的空格處填上一個恰當的詞，使短文完整、通順。
Dear Bob,
My name is Rich .I’m fourteen    【小題1】   old. I’m studying in a middle school. My school is nice and clean. There are 30 students in my class. It’s    【小題2】  today. My classmates and I are    【小題3】 a good time on the beach. It’s a nice place .The water is blue and clear. Many birds   【小題4】   flying over the sea. Many people are    【小題5】  in the sea. Some boys are   【小題6】   football. Some people are lying   【小題7】  the beach. A girl is    【小題8】  a book on a chair .Another girl is    【小題9】  photos. I   【小題10】 writing to you! What are you doing?
I hope you can write to me soon.
Best wishes!
Rich

— Hello, Sandy. This is Jack. What are you doing?

— I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.

A. has been    B. was        C. had been    D. will be