下列各句中，没有语病的一项是(　　)

ally, no supper is the best way to loseweight.–________. As a matter of fact, it does harm to yourhealth.

How do you usually come to school, by busor bybike–.I walk.

You must watch carefully everything _____ the teacher does in class.

__about her son’s future, the mother has beensleeping very badly these months.