We also had different students in some classes, so ______was a struggle to remember all the faces.
I asked him to come at seven o’clock, but he __________. It’s already eight o’clock.
He has promised to _________ the matter and will give the workers a satisfactory answer.
Rather than ________ on a crowded bus , he always prefers ________ a bicycle.
When he came back, his wife was found _________.
Every minute should be made the most of ________ our lessons well.