.Although many great people ever failed, they never_______ and managed to succeed.

Excuse me, is the post office? —About 500 metres away. [ ]

Tony lost his wallet. He didn’t talk to __________ all the afternoon.

Don’t be nervous. There is ___________.

It’s quite a time _____ Liu Xiang was injured in the foot, but we are sure it won’t be long _____ he returns to the track.