Exercise8.7. Give definitions to the following using the vocabulary
1)CPU
2) ROM
3) Floppy-disk
4) CD-ROM
5) Printer
6) Modem
7) Motherboard
8) Hard disk
9) Keyboard
10) Sound-card

1c

2a

3c

4c

5b

6b

7b,c

8c

9b

10c

11b

12b

13c

14d

15c

16a

17b

18d

19d

20c

21c

раньше была тюрьма, а сейчас там либо экскурсии проводятся или еще что-то(точно не помню)

she is doing  her homework. we have our    english lesson in the evening. he is putting on his rain-coat. i often do my   homework with my   friend. this lady’s surname is smith. what’s her   first name? please sit down. is it your    document? they do their morning exercises in the open air. this table is too small. what’s its length?

wild elephants have strong family ties. the females and young are social, living in groups under the leadership of an older female or matriarch. adult males are solitary, although they stay in contact with the females over great distances, using sounds well below the range of human hearing. family groups communicate with each other using these low-frequency vibrations. it is an eerie sight to see several groups converging on a waterhole from miles apart, apparently by some prearranged signal, when human observers have heard nothing.  the natural lifespan of an elephant, about 70 years, is comparable to a human's. elephants reach breeding age at about 15 years of age. females generally give birth to one 200-pound baby after a 22-month pregnancy.