《2024年走进重高培优测试九年级英语全一册人教版》

A
Lab work is fun but you must be careful. Listen carefully when your teacher reads and explains the rules before your first lab lesson.

（ ）1. You must know the LAB RULES ________ the first lab lessons.
A. before B. since C. during D. after
（ ）2. It is necessary for you to ________ before every experiment.
A. read all instructions carefully
B. take enough food and drinks
C. smell chemicals immediately
D. talk with your classmates
（ ）3. If you are not sure of how to use any apparatus, ________.
A. read the rules carefully
B. try them again and again
C. ask your teacher for help
D. return all apparatus to the places where they were
（ ）4. The underlined word “spill” means “________” in Chinese.
A. 照射 B. 伤害 C. 摔下 D. 溅出
（ ）5. When you are in the science lab, you mustn’t ________.
A. be careful in order to prevent injury
B. listen carefully when your teacher explains the rules
C. taste chemicals without the teacher’s permission
D. throw waste materials into proper waste baskets

答案： 1.A　2.A　3.C　4.D　5.C