—Why do you look so worried? —My computer broke down and my essay ______ unfinished since.
His parents wouldn’t let him marry anyone ______ family was poor.
He attends the evening class ____, that is, Monday, Wednesday and Friday.
Many tall buildings _______ in Shanghai in the past few years.
We were running out of gas. I went off ____ a service station where I could buy some gas.
There is no _______ that drinking milk before going to bed is helpful to our health.