Laboratory work is your chance to learn science firstly. It can be fun, but you must be careful to avoid hurting.Listen closely when your teacher reads and explains the rules before your first lab lesson.

LABORATORY RULES

Throughout the lesson

*Do not enter the science lab without the teacher’s agreement. Do not bring food or drinks into the science lab.

Before the experiment

Read all instructions carefully before every experiment.

Prepare all instruments and put them in order so that you will not knock them over while doing the experiment.

During the experiment

If you are unsure of how to use any instrument or how to operate, ask your teacher for help.

Never smell or taste chemicals unless you are allowed.

After the experiment

Wash all instruments after using and return them to the places where they were

Throw waste materials in proper waste baskets.

First aid

Report all accidents to your teacher immediately.

If you pour any chemicals onto your body or clothes, wash with plenty of water and report to your teacher.

1.Your teacher will probably tell you the rules above __________ the first lab lesson.

A. before B. since C. during D. after

2.It’s clear that you can _______________

A. bring food into the lab

B. enter the lab anytime

C. smell chemicals as you like

D. learn science directly in the lab

3. If you get chemicals on your clothes, which of the following ways can you find to solve it?

A. Before the experiment B. First aid

C. During the experiment D. After the experiment

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