16. —Who____ it be that is knocking at the door?
—It ____ be Father, but I’m not sure.
| A．can; must | B．can; may | C．must; can | D．may; must |
The discovery of gold in Australia led thousands to believe that a fortune __．
| A．was made | B．would make | C．was to be made | D．had made |
John was given the same suitcase his father and grandfather ____ with them to school．
| A．took | B．had taken | C．were taking | D．would take |
The journey around the world took the old sailor nine months, ____ the sailing time was 226 days．
| A．of which | B．during which | C．from which | D．for which |
Everyone would like to see the plan carried out the manager thought of _____ the present situation．
| A．solving | B．being solved | C．to solve | D．to be solved |
There came a stranger with his cap pulled over his face, ______ I thought seemed curious about what I was carrying．
| A．that | B．who | C．whom | D．which |