— When shall we restart our business?
— Not until we our plan.
| A．will finish | B．are finishing |
| C．are to finish | D．have finished |
8. I didn’t see your sister at the cinema. If she ______, she would have met my brother.
| A．has come | B．did come | C．came | D．had come |
9. _____ all behavior is learned behavior is a basic assumption of social scientists.
| A．Nearly | B．That nearly | C．It is nearly | D．When nearly |
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 |