It took us ________ to finish theexperiment on the monkey

Teenagers _____their health because they play computer games too much

Is there an express to Beijing tonight? — There ______be , but you’d better call the booking office to make sure.’

My friend likes singing and talking with others. But I often stay at home to watch TV. So my friend is than me.

The generous man has made up his mind to _________a home for the old in his village.