At first, I completed Chemistry and Biology Multiple Choices.

Then I did Physics Experiment Completion and 3 Calculation Problems.
When all of the above were finished, there was about 50 minutes left.

Next, I did Physics Multiple Choices, and the first completion problem (Problem 8). I completed 3 out of 5.
When I was doing (4), the radio reminded us that there was only 15 minutes to go.

I quickly finished Biology Exam Paper 2 carelessly, then some of questions of Chemistry Paper 2, which I know a little.

Before the exam, I found one primary school classmate of mine in my room, sitting to my right at a distance of about 5 mitres.

After the examination came to an end, I went to the toilet, which was full of people, but not so much as yesterday noon.

After the exam, I was always thinking about the situation where Zhang TiMing scolded me violently and said that I was the laziest person in our class and I didn't have any grades at all. So I was in a terrible mood.

A Natural Sciences Examination practice is timetabled to be carried out on 30th January in our school,

理综，英语：Natural Sciences（我是在英文维基百科发现这种叫法的）

In fact, I am not very good at Natural Sciences Examinations because I always don't have enough time to do Chemistry Paper 2.
I usually spend less than 5 minutes on Biology Paper 2 while more than 35 minutes on Physics Paper 2.....

I think Physics is the most important one of the three subjects so I spend more than 60 minutes on the paper, leaving very little time for Chemistry and Biology paper 2 (the 21 multiple choices are of vital importance!)