If you work hard and never __________, you will learn Maths well.

Does your brother always work so hard?—Yes.______ he catches a cold or has a fever sometimes

Today Bob contradicted Ms. Li, our math teacher, in class, _____ made her angry with him.

Whenever it ______ the money I lost, my father always tells me to learn a lesson from the event and never ______ such trick again![ ]

1They usually have lunch atschool, ________