Read and answer. (阅读短文，选择正确的答案)

     I am Joy. I am a happy girl. Last week I was very busy. I had a maths test last Friday. I am not 

good at it. So I had to study for the test from Monday to Thursday. My mother was ill last Tuesday. 

She had a bad cold. My father is a policeman. He went to Dalian last Wednesday. He had a meeting 

there. So I had to look after my mother. I had to go shopping and do the housework. I was really 

tired.

1. 一 What's wrong with Joy's mother?

    一 She had a _____.

A. toothache.    

B. headache    

C. bad cold

2. Last _____ I had a maths test.

A. Tuesday  

B. Friday    

C. Thursday

3. Joy had to _____ because she is not good at maths.

A. sweep the floor  

B. do some cooking    

C. study for her test

4. Joy's father is a _____. He went to Dalian.

A. teacher  

B. worker  

C. policeman

5. 一 What did Joy's father do in Dalian?

    一 He ____ there.

A. went shopping  

B. had a meeting  

C. did housework

进行加标回收率测定时，加标的原则是加标浓度合理。