What would happen to the earth if the sun suddenly switch off some day

It was careless of Lucy to________ the same mistake once again.

26. I think the student ought to be punished. He shouldn’t ________ cheating in the exam.

_____ the Internet is of great help. I don’t think it’s a good idea to spend too much time on it.

Shall we go for a picnic tomorrow– Well, it all _______ the weather.