Liu Xiang earned the respect from the whole world as he hopped down the track to the finishing line, ____ the last hurdle.

.—You were brave enough to raise objections at the meeting. —Well, now I regret __    _ that.

Aboriginal （土著居民）is a term ______ to describe the people living in a place from the earliest _______ times or before European arrived .

Tom kept quiet about the accident ______ lose his job.

Though trying really hard, they acknowledged ____ at last.