题文
The public is requiring the Malaysian government to share________ Flight MH370.
| A．what they have known about | B．what have they known about |
| C．when they have known about | D．when have they known about |
The public is requiring the Malaysian government to share________ Flight MH370.
| A．what they have known about | B．what have they known about |
| C．when they have known about | D．when have they known about |
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