12. A Russian plane broke up in the air, ________ all 224 people on board which was believed ________ by a bomb planted by Islamic State.

28.

54. A neighborhood was classified as a “slow” one when ________.

44. What can we learn from some recent studies ________

1. ______ increase in the oil price have prompted anxiety among the car owners.

49. Which of the following is true about the research under discussion?

23.

46. What does the Indiana University study show?

3.We work to make money, but it’s a ________ that people who work hard and long often do not make the most money.

17. —Why do you choose to work with special needs children?   —I think it will add a new _____ to my life.

13. The novel contains some marvelously revealing ________ of rural life in the 19th century.

27.