It is _______ he had to send his brother to hospital _______ he was late.

Tom ________ in the library every night over the last three months.[ ]

You ______ worry about their safety．They are old enough to take care of themselves.

I ______ becoming a pilot when I was at school.—– Really Do you still think it will _____

It’s reported that a person throws away 50kg of food every year. We should save food.