问题详情：
1．City people want to be outdoor on the weekend and do something ________ (challenge)．
2．While I was busy ________(prepare)for the final examination，I spent some time doing exercises every day.
3．The bad weather meant ________(delay)the rocket for 48 hours.
4．Though he has just graduated，he is ________(experience)at teaching.
5．The song written by the artist will be ________(broadcast)at CCTV，which I dare say will be popular soon among people.
【回答】
lenging aring ying
4．experienced dcast
知识点：完成句子
题型：单词拼写
