Укажите предложения, в которых «one/ones» является заменителем существительного (таких предложений должно быть 5).
1. One can see that electrons in crystals have wave properties.
2. The problem to be solved is in fact a theoretical one.
3. To heat a body one should place it in contact with another body at a higher temperature.
4. One must test the device several times.
5. The second device was tested about a month after the first one.
6. One can increase effectiveness applying this method.
7. It is necessary to use a new method, not the old one.
8. One uses special devices to measure speed, weight and length.
9. His last book is good, but the previous one is better.
10. Among the numerous disadvantages of this device power loss is the most evident one.
(1) I saw him ... his bag on his way to school
b)drop
(2) Father wanted his son ... a film produser
a) to become
(3) When my father was at school he ... his hair short
a) wore
(4) I... a lot of letters today. Now i'm free
c) have sent
(5) When Dad .. we ... down for dinner
a) comes / will sit
(6) While we ... someone ...her bag
c) were talking / took
(7) I ... the camera, if it ... not expensive
b)will buy / is
(8) Mozart .. a lot of wonderful pieces of music
b) composed
(9)Alex called for a taxi after he .. his suitcase
b) had packed
Вроде так)