学习词汇：certain, active, possible, tidy, uncertain, inactive, impossible, untidy, incorrect, impatient
学习词组：tidy up, be usual for, be possible to do sth. all over the floor, right now
学习句子：It’s usual for me to stay at home all day,
It’s possible to sleep with al that noise.
I’m certain that I can fix it myself.
Things are all over the floor.
I’ll tidy up right now.