8. The key to ______ peace is regular and honest communication through ______ you can learn when to ______ and when to ask your parents to relax their control.
A . keep; which; back downB . keep; that; cheer upC . keeping; which; back downD . keeping; that; cheer up
24. I shall never forget those days outside the school ________ I studied on line at home, ________ is always making me think of________ I can do more for my homeland.
A . that; which; whichB . which; that; thatC . when; as; whatD . when; which; how
35. Among the countries listed in the 2021 World Happiness Report, those at the bottom were mainly underdeveloped countries ________ issues such as political conflicts have been widespread in recent years.
38. These days, pet-keeping urge has spread even to parts of the world ________ have no tradition of sink into a comfortable couch with a furry creature.