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7. Complete the following sentences using modal verbs:
1. Chemicals... be used carefully in the laboratory
2. You... stay out of the laboratory if your teacher is not there.
3. You... obey the laboratory rules when working there.
4. If you... to smell any chemical, fill your lungs with air first, then sniff carefully.
5. As you... see, many of the chemicals... be dangerous.
6. All chemicals... to be treated with care.
7. Ethanol and water... look alike.
8. What we... to remember is that a substance... be recognized by its properties.
9. How... you tell that a substance is pure?
10. Dalton's ideas about atom... explain many experimental observations and scientific laws.
11. Elements... be decomposed because the atoms they are made of are indestructible.
12.The question that we... answer at the start is: how do the atoms get electrical charges?
8. Listen to the following dialogue, then answer questions choosing the correct answer out of the given ones. The notes and words given below will help you to understand the conversation better:
1. Who are the participants of the conversation?
a) students,
b) teachers,
c) chemical engineers.
2.What are they doing in Tokyo?
a) they are having vacation,
b) they are on business leave,
c) they are working.
NOTES
1. I can hardly believe my eyes! — Я не верю своим глазам!
2. I'll be darned! — Провалиться мне на этом месте!
3. Would you believe it?! — Веришь ли?!
4. It must be.,. — Должно быть...
5. What a coincidence! — Какое совпадение!
6. Fancy that! — Подумать только!
7. You must be kidding! — Ты, должно быть, шутишь!
8. Right you are — Совершенно верно
9. Good job! — Молодец!
10. Look. — Послушай.
11. Same old Philip. — Все тот же старина Филипп.
WORDS
chlorine — хлор mixed — смешанный
corrosive — едкий phosphorus — фосфор
dangerous — опасный skin — кожа
explosive — взрывоопасный to spill — пролить
flammable — огнеопасный to splash — брызгать
to happen — происходить sulphuric acid — серная кислота
immediately — немедленно unless — если не
to light — зажигать
MARY: Excuse me, sir... Philip! 1 can hardly believe my eyes!
PHILIP: Mary... Mary Raffety! Oh, well, I'll be darned!
MARY: It must be all of... how many years?
PHILIP: Two... no... three. Would you believe it? And here we are in Tokyo. What a coincidence!
MARY: What are you doing here? Are you on vacation?
PHILIP: No, I work here. Teaching chemistry for The British Council. What about you?
MARY: The same with me. Assistant professor at the University.
PHILIP: I've just made a short presentation on safety in the laboratory
MARY: Really? Fancy that! You are kidding!
PHILIP: Well, why?
MARY: Because I've just done the same.
PHILIP: Oh, no! And how did you begin your talk?
MARY: Well, first I said that many of the chemicals could be dangerous.
PHILIP: Right. Phosphorus, sulphuric acid and chlorine, for instance. Did you tell them that chemicals must never be tasted?
MARY: Yes, of couse. I also said that some chemicals are flammable.
PHILIP: Certainly. They could be explosive if the students try to light them under certain conditions. By the way, what about the chemicals that are corrosive. Have you mentioned them? MARY: Oh, yes. I explained that if these chemicals are spilled or splashed on the skin they must be washed off immediately with water.
PHILIP: Good job! I also spoke about the chemicals that are very reactive with one another.
MARY: Do you mean that students should never play with chemicals to see what happens when they are mixed?
PHILIP: Right you are! That's why they shouldn't stay in the laboratory unless a teacher is there. MARY: Good job!
PHILIP: Look... Let's have lunch together. There's a cafe nearby
MARY: Same old Philip!
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