1. Barbara Grey works in East Square London School, doesn't she? - Yes, she does.
2. Mr. Wooding invited a group of Russian students to London, didn't he? - Yes, he did.
3. A group of up to 22 people can go to London, can't they? - Yes, they can.
4. Mr. Wooding didn't write about the time of the visit, did he? - No, he didn't.
5. The Russian students will stay with English families, won't they? - Yes, they will.
6. The Russian students won't be responsible for social Programme, will they? - No, they won't.
Is, some, put, is, cut, to
1. She hasn't been home (с- since) her marriage.
<span>2. Where have you been (с- since) our last metting?
3. I've been working for the company (с - since) 1996 to now.
4. I've been waiting here (с</span><span> - since) 5 o'clock.
5. (с)</span> - During<span><span> (since)</span> October the weather has been awful.
6. He said he had been waiting for you (с - from) five to seven p. m. You had never come.
7. My younger boy has been using computer (с</span><span> - since) the age of four/
8. He has been here (с</span><span> - since) Monday.
9. The library is open (с - from) 9 a. m. to 8 p. m.
10. Richard has been in Canada (с</span><span> - since) January.
11. It usually rains here (с - from) November to February.</span>
Ответ:
<em>It</em> is generally considered that no sex differences exist in the count of white corpuscles or leucocytes. The count of leucocytes in the blood of a healthy person is 4,500 to 9,500 per cu mm (cubic millimetre). When<em> the number of white blood cells</em> (WBC) is counted after mental or physical exertion, meals and mild activity it may increase to 10,000 and more per cu mm.
<em>It</em> is estimated that the erythrocytes are the most numerous cellular elements, ranging from 4,000,000 to 5,000,000 per cu mm. The red blood cell count (RBC) may change with age; when <em>the red blood cell count</em> is done after physical exertion and emotions it may increase.