22. We know a good deal about the people who lived in China 4, 000 years ago, because they ______write and leave written records for those who lived after them.
The harder you_______ , the greater progress you______ .
The young man admitted, after several hours questioning,_______ a wallet from the passenger on the bus.
The building project ______ next year is, I think, not easy ______ in time.
Tom looked at Jenny, tears ______ his eyes, and shouted out the words ______ in his heart for years.
All the things _________ must be done well.