29.The young man,who by then admission to university,decided to do some part-time jobs to gain more practical experience.
The pen ________ he is writing is mine.
Can you lend me the book ________ the other day?
At the party,John made up a joke,________ people burst out laughing.
That is the day ________ I'll never forget.
Do you know the year ________ the Chinese Communist Party was founded?