I saw Tom in the meeting-room, so heattend the meeting.

public’s delight, a large number of government officials who _______ their power have been well punished.

The Copenhagen Climate Change Conference failed to reach any agreement and______________now seems little hope of a settlement

The waste water, when _______，should be clean enough to meet standards.

This is 3-Dprinter. And this is an artificial (人工的) ear. Canyou believe that scientists printed this artificial ear by this 3-D printer