阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
1．The Palace Museum has a ________(collect) of 96 million pieces of ancient Chinese artworks.
2．The head office of the bank is in Beijing, but it has ______(branch) all over the country.
3．He is a newcomer in the team, but I have the ________(impress) that I've seen that man before.
4．I don’t want to become __________ burden to my children when I’m old.
5．So far, many Chinese works of art have won the ________(appreciate) of a lot of people outside China.
6．To be honest, some new __________ (arrive) lose hope even before they start hunting for a job.
