3．Lily took a few friends to my birthday party，none of __________ I was familiar with．
| A．which | B．whose | C．that | D．whom |
--- I was wondering if we could go skiing on the weekend.
--- ______ good.
| A．Sound | B．Sounded | C．Sounding | D．Sounds |
Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he begun | C．he began | D．he had begun |
500 yuan can ______ all my monthly expenses.
| A．cover | B．spend | C．fill | D．offer |
Tom raised his hands ______ to say something, but he remained silent in the end.
| A．even if | B．as if | C．so that | D．now that |
______ from the top of the tower, the south foot of the mountain is a sea of trees.
| A．Seen | B．Seeing | C．Having seen | D．To see |