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In the laboratory class

Use the phrases from the box in the following sentences.

1) You mustn’t interrupt the speaker! Ask you questions after he finishes his talk.

2) I think he should come promptly. It’s really important.

3) He mentioned that he was having problems, but he didn’t explain.

4) Most courses involve eight hours attendance at college each week.

5) Dan had an accident at work and had to go to hospital.

6) You must thoroughly clean your working place.

7) Journalists in Cairo report that seven people were injured.

8) 400 illustrations complement the text.

9) The process starts appropriately with determining supply and demand.

10) Do you have any previous experience of laboratory work?

1. Do you have any lab classes? What lectures do they complement? What are the requirements for the lab work? Does your lab instructor take attendance? What safety measures do you have in your lab?

2. Listen to the regulations and instructions for the laboratory class. What are the three main points of the speaker? Do you think the rules are reasonable? Would you comply with them?

Read the text and underline all the modal verbs. Complete the sentences below.

In the laboratory class

Good morning. I am Michael Armstrong, and I am your laboratory instructor. This class is intended to complement the lecture which Dr. Ehrhardt will be conducting. This class will meet twice a week. The laboratory begins promptly at nine. You must be on time. I don’t intend to wait for latecomers or repeat what has already been covered if you miss the explanation. You mustn’t be late and interrupt your neighbors. You may as well not come if you can’t be on time.

Attendance is equally important. Each laboratory session builds on the concepts and tools learned in the previous sessions. If you miss a lab session, it will be more difficult for you to grasp the presentation of the following session. If you miss three lab sessions, you are dropped from the lab – no excuses. You cannot complete the lecture without completing the lab work.

Safety is the key here. It is very important to keep things neat and clean, dress appropriately, and be careful. You may not eat, drink, or smoke in the laboratory, and you should always clean your counter and wash your hands thoroughly both before and after the laboratory session. Long hair must be tied back. Loose clothing must not be worn. See how easily the swab catches fire when passed over the burner! Any laboratory accident must be reported immediately.

I hope you’ll enjoy the laboratory. It’s a wonderful place, and all the requirements I’ve just mentioned are for your benefit. We will begin today by learning about the microscope.

2. Complete the following sentences using the modal verbs from the text:

1. You __________ obey laboratory rules while working there.
2. Students _________ come on time and ____________ disturb others by being late.
3. You _________ come if you __________ be on time.
4. If you don’t complete the lab, you _________ complete the lecture.
5. You ___________ eat, drink or smoke in the laboratory.
6. Students __________ leave their working place tidy.
7. Long hair _________ be tied back.
8. Baggy clothes ___________ be worn because they ____________ catch fire.
9. If you _________ smell the fumes, you ___________ report immediately.

3. Discuss in pairs which modals from the text are used to express:

obligation, negative obligation, no obligation, permission, recommendation, ability, inability

If in doubt, read Grammar (1) below and Appendix (3).

Modal verbs of obligation: must/mustn’t, have to/ don’t have to, should/ shouldn’t