John has recovered and _________ 3 kilos since he left hospital last month.
| A．put up | B．put down | C．put away | D．put on |
10. By the middle of the 21st century , the vast majority of the world’s population ________ in cities rather than in the country.
| A．are living | B．will be living | C．have lived | D．will have lived |
11. It is because people are likely to stay indoors ______ the virus can spread easily ______ people often catch colds.
| A．and, that | B．so, that | C．therefore, so | D．that, that |
12. He gave us a nod and muttered a “yes” after _______ seemed like hours.
| A．that | B．which | C．it | D．What |
13. In any case, parents should make clear _______, if any thing, the children are expected to pay for with the money.
| A．that | B．which | C．what | D．How |
14. Many new games are designed on the computers all the time; people of all ages ______ these games.
| A．are playing | B．had played | C．have been playing | D．Play |