Cold ______ the night air was, he slept soundly because he was so tired after working for a whole day.

My newly-purchased magazine is nowhere to be found. ____ I left it on the train? [ ]

Han Han is one of ______ teenager writers today.

I suggested to my father that we________to Dalian for a holiday this summer, but the expression on his face suggested that he________to it. [ ]

So far there great changes in my hometown.