＿＿＿＿being March 12th, they planted trees on the hill.
| A．That | B．It is | C．It | D．This |
It is just _______ much a competition among countries to host the Olympics as ______ an Olympic medal.
| A．as ; to win | B．as; winning | C．so; to win | D．so; winning |
---__________ will this goal be achieved?
--- After 2011.
| A．How long | B．How often | C．How soon | D．How far |
There is no doubt ________ Tom is a good clever boy.
| A．whether | B．if | C．when | D．that |
Almost seven tons of amber__________ the Amber Room.
| A．was used to make | B．was used to making |
| C．were used to make | D．were used to making |
Only when I got here _________ that I had made a big mistake.
| A．did I realize | B．I realized | C．I have realized | D．have I realized |