... work for about 30 to 35 years of their lives. This mean that man must
learn to do their share of family tasks such as caring for the children and daily (42)_____ chores.
Children, too, especially ... 30: Widespread forest destruction _____ in this particular area.
A. must have seen B. ought to see C. could have seen D. can be seen
Câu 31: _____ anything suspicious arise, please let me know...