It's+ adj+to do 六个句子
问题描述：
It's+ adj+to do 六个句子
not.until 六个句子
答
it's easy to do the homewoek.it's difficult to do the job.it's important to finish the work.it's helpful to take a walk.it's useful to read the newspaper.it's happy to hold a party.i didn't sleep unti...