阅读下面的内容，将划线部分的句子译成汉语或英语。（共5个小题，每小题2分）

Last year my English class was difficult小题1:first of all, it wasn’t easy for me to understand, what the teacher said.To begin with, she spoke too quickly, and I couldn’t understand every word. Later on, I realized that it doesn’t matter if you don’t understand every word小题2:I was also afraid to speakin class. because I thought my classmates might laugh at me. I couldn’t always make complete sentences, either. Then I started to watch English-language TV. 小题3:这很有帮助. Ithink thatdoing lots of listening practice is one of  the secrets of becoming a good language learner. Ialso found English grammar very difficult. 小题4:50 I decided to take lots of grammar notes inevery class. Then I started to write my own original sentences using the grammar I was learning It’s amazing how much this helped.小题5:现在我喜爱学英语

常用的宝石鉴定仪器有哪几种？并说明各自的用途。（其中：放大镜的倍数；偏光镜的四种现象解释；折光仪的测定范围等。）（宝石放大镜、宝石显微镜、折射仪、偏光镜、二色镜、分光镜、查尔斯滤色镜、荧光仪、热导仪）