Exercise 7 1. There are thousands (A) of kinds of bacteria, many (B) of whom (C) are beneficial (D). 2. In stead of (A) their (B) frightening (C) appearance, the squid is shy and completely harmless (D). 3. One of the most (A) popular holiday (B) in the U.S. is (C) Thanksgiving, which is celebrated in (D) November. 4. The girl whom about (A) we are talking (B) used to be (C) a Miss World (D). 5. After John eaten (A) dinner, he wrote (B) several letters (C) and went to bed (D). 6. Food prices (A) have risen (B) too (C) rapidly that we have to change our eating habits (D). 7. She asked why (A) did Mathew look (B) so embarrassed (C) when he saw (D) Carole. 8. When (A) I met John last year, he has already graduated (B) from (C) university for (D) a year. 9. Do you (A) think two hours are too (B) long to wait for (C) someone (D)? 10. My (A) mother still spends (B) 14 hours a day (C) do (D) the housework. Exercise 8 1. Either (A) the doctor or the nurses takes (B) care of changing (C) the patients’ (D) bandages. 2. Please arrive (A) on time in order to (B) we will be able (C) to start (D) the meeting punctually. 3. They hardly never (A) go to the beach (B) because of (C) their sickness, do they (D)? 4. The people in Europe are now using (A) the common unit of money called (B) Euro, although (C) the economies in those countries are not exact (D) the same. 5. Most (A) bacteria has (B) strong cell walls much (C) like those (D) of the plants. 6. The (A) first nation park in (B) the world, calling (C) Yellowstone Park, was established (D) in 1872. 7. My father used to giving (A) me some good (B) advice whenever (C) I had a problem (D). 8. All the (A) witnesses said that (B) John was blaming for (C) the accident (D). 9. The doctor advised him (A) to avoid eating (B) fatty foods, having (C) more fresh vegetables and drink much (D) water. 10. People should not expect to rescue (A) by their parents every time (B) they get into (C) fin