35. So mysteriously ______ missing that many puzzles wait to be solved.
| A．did Flight MH370 go | B．Flight MH370 went |
| C．does Flight MH370 go | D．had Flight MH370 gone |
---__________ 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 |
When they organized the ANC Youth League, he_________ it as soon as possible.
| A．attended | B．joined | C．took part in | D．joined in |