Английский язык. Ч. 1. Ильичева Н.А - 9 стр.

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        6. Energy stored in food and fuel can be regarded as…………energy (poten-
tial, kinetic, prospective)
        7. When a force is applied to change the velocity of an object, work is done
against………… (immobility, inactivity, inertia).

       C. Fill in the correct word derived from the words in brackets:
       1. Work requires not only a force but also motion or the…………of an object
through a distance. (move)
       2. The…………of the object presses down and we push up with an equal and
opposite force. (weigh)
       3. A simple example of the conservation of mechanical energy is a rock al-
lowed to fall
       4. from a………….under gravity (neglecting air resistance). (high)
       5. Potential energy is the energy a body has because of its position or…………
(locate).
       6. The book on the table has energy and…………to do work because of its po-
sition. (able)
       7. Often the…………of energy involves a transfer of energy from one body to
another. (transform)
       8. 19.It is very important to see the…………between energy and power. (dis-
tinct)
       9. Energy is sometimes called…………work. (store)

       D. Put the verbs in brackets into the Past Simple or the Past Continuous:
       1. At six o’clock this morning I (have) a wonderful dream, but then the alarm
(go) off.
       2. He usually wears sandals but when I last (see) him he (wear) boots.
       3. I saw Sid when I (come) to work this morning. He (shop).
       4. From the sounds it was clear that Mary (practice) the piano.
       5. I (look) out of the window and see that we (fly) over the mountains.
       6. He suddenly (realize) that he (travel) in the wrong direction.
       7. The burglar (open) the safe when he (hear) footsteps. He immediately (put)
out his torch and (crawl) under the bed.
       8. As I (cross) the road I (step) on a banana and (fall) heavily.
       9. The boys (play) cards when they (hear) their father’s step. They (hide) the
cards and (take) out their lesson book.
       10. He (clean) his gun when it accidentally (go) off and (kill) him.

     E. Put the verbs in brackets into the Past Simple or the Present Perfect
Simple:
     1. My brother (write) a lot of plays. He just (finish) his second tragedy.
     2. Shakespeare (write) a lot of plays.
     3. I (wear) my hair long when I was at school.
     4. I (not see) him for three years. I wonder where he is.
     5. You (lock) the door before you left the house?
     6. Cervantes (write) Don Quixote.