根据短文内容，选择正确答案。

      Last Saturday was October 12th. The weather was windy and cloudy. I was busy. I did my homework

on that morning. I didn't feel worry, because the homework was so easy. Then I went shopping with my

mother. We bought some food and apples. My mother bought a football for me. I was excited. In the afternoon,

I visited my grandpa. He had a headache. He took medicine and stayed in bed. I did housework for him. I

cleaned his room, watered the flowers, washed his clothes and cooked dinner. I was tired in the evening. Did

you have a busy and happy weekend? Please tell me.

1. October 13th was _____________.

A. Sunday

B. Saturday

2. I did my _____________ on Saturday.

A. homework

B. housework

3. I got _____________.

A. good food

B. a football

4. My grandpa felt _____________.

A. sick

B. well

5. I was _____________ on Saturday morning.

A. tired

B. excited

用一个³²P标记的噬菌体侵染细菌，若该细菌解体后释放出32个大小、形状一样的噬菌体，则其中含有³²P标记的噬菌体有（）

A.0个

B.2个

C.30个

D.32个