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VII. Write 10 equations and ask your partner to read them.

VIII. Project work

Make up a report on any chemical element. Think about the discovery date, the scientist or scientists who discovered it and find out the circumstances of its discovery.

IX. Grammar: Past Tenses

a. Put the words in brackets into Past simple or Past Continuous.

1. While I … (work) hard my lucky sister … (do) nothing.

2. I couldn`t answer the phone when it … (ring) because I … (have) a bath.

3. I didn`t hear a thing because I … (watch) television when the burglar …

(break in)

4. John …(repair) his car while Steve … (tidy) the garage.

5. Before cars were invented people … (walk)

6. Just as I … (park) my car another man … (drive) past and nearly …(hit) my car.

7. When I …(pass) my driving test I … (can/not) answer some questions.

8. Look at the rain! It`s hard to believe that at this time last week we … (swim)

b. Complete the sentences below by putting the verb in brackets into the most suitable form of the Past Perfect or the Past Perfect Continuous.

1. We were good friends. We … (know) each other for a long time.

2. Mary was sitting on the ground. She was out of breath because … (run)

3. I was upset that I … (sell) my car. I … (have) it for a very long time.

4. We were extremely tired at the end of the journey. We… (travel) for more than 24 hours.

5. When I got home, Mike was sitting in front of the TV, but not watching it. He… (just/turn) it off.

6. As I … (never/see) the handwriting before, I began to feel slightly alarmed.

7. I wasn`t hungry at lunchtime. I … (have) a big breakfast.

8. Julia … (stand) at the bus stop for twenty minutes when Daniel drove up and got out of the car.

c. Open the brackets and put the verbs into the proper tense (Past Simple, Past Continuous, Past Perfect or Past Perfect Continuous).

1. Yesterday afternoon Sharon went to the station to meet Paul. When she … (got) there, Paul …(wait) for her. His train … (arrive) early.

2. When I got home, Bill … (lie) on the sofa. The television was on but he … (not/watch) it. He … (fall) asleep and was snoring loudly. I … (turn) the television off and just then he … (wake) up.

3. Last night I … (lie) and …(read) a book when suddenly I … (hear) a noise. I got up to see what it was but I … (not/see) anything, so I went back to bed.

4. I …(meet) George and Linda yesterday as I … (walk) through the park. They … (be) to the Sports Centre where they …. (play) tennis. They were going to the café for a drink and … (invite) me to join them.

5. Mary had to go to New York last week, but she almost missed the plane. She … (stand) in the queue at the check-in-desk when she suddenly realized that she … (leave) her passport at home. Fortunately, she didn`t live very far from the airport, so she had time to take a taxi home to get it. She …(get) back to the airport just in time for the flight.

6. When Jane`s husband … (leave) her she … (sell) their wonderful house.

UNIT 3

Laboratory equipment