change；pollute；simple；in the past；suppose；worse；the number of；speak up；used to；spare
【小题1】Please stay with us. We have a________room for you.
【小题2】________ pages in this book is two hundred.
【小题3】His illness is even________than I thought it would be.
【小题4】The old man can't hear well. Please________a bit.
【小题5】Life here today is much easier than it________be.
【小题6】I________you are right.
【小题7】If there is more________，the air in our home town will be much dirtier.
【小题8】My parents usually buy me some________clothes that can last a long time.
【小题9】The city has________greatly in the past ten years.
【小题10】The life________was much harder than today.