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 |
----- How do you find the concert last night?
----- ___________ .
| A．With a map. | B．I don’t think much of it. |
| C．By taking a taxi. | D．I couldn’t agree more. |
Many workers are out of ______ condition. Therefore, the union fights ______ better working conditions.
| A．a, against | B．/, for | C．/, with | D．the, for |
He pretended _______ me when we met in the street.
| A．not to know | B．not to be knowing |
| C．not having known | D．not knowing |
Their parents’ advice is ___________. Which one is NOT right?
| A．worthy of being considered | B．worthwhile to be considered |
| C．worth considering | D．worthy to be considered |
They raised a lot of money and ________ a school for the children in the mountain area.
| A．took up | B．built up | C．made up | D．set up |