—He is always picking up very heavy things just to show ________ his strength.—What a man!
9. _____ all behavior is learned behavior is a basic assumption of social scientists.
10. By the middle of the 21st century , the vast majority of the world’s population ________ in cities rather than in the country.
11. It is because people are likely to stay indoors ______ the virus can spread easily ______ people often catch colds.
12. He gave us a nod and muttered a “yes” after _______ seemed like hours.
13. In any case, parents should make clear _______, if any thing, the children are expected to pay for with the money.