My name is Cathy. I'm a fourteen-year-old girl from England. Now I'm 1 in a middle school.I have to say that I was not good 2 my lessons before. So I was always afraid of exams.

    Last week I 3 my end-of-year exams. Today I got my report card. 4 ， I did very well. My mom and dad said it was the best report. It was 5 main subjects that the report card talked about， and I felt very 6 today. My teachers ticked( 给…打勾 ) “7 to improve”，“Good” or “Very good”. My English teacher said my English was much better. For math and science I also 8 “ Very good” ticks. All my teachers said I was 9 And at the end of the report card my head teacher said， “A very good 10. Well done!” I am so pleased with it，but I hope I can get a better report next year. I'm sure I can.

短周期元素组成的物质Q，发生如下反应：QR+T+H₂O，下列说法正确的是（　　）

地球上动物种类多种多样，目前已知的大约有多少种（　　）

下列各组中的两个集合M和N，表示同一集合的是（　　）