n’t you ______ to a more sensible method —-Well, I’m thinking about it

It was because of bad weather __________ the football match had to be put off.

Do you know when the Chinese custom_________ from?–It’s hard to say. But its characteristics__________ the Tang Period.

Taking charge of such a bigcompany, I’mafraid, is _____ his ability.

_______ the extreme levels of air pollution, city authorities have started to take measures to quickly reduce pollution levels and protect city dwellers.