lunteers will visit the primary school nextMonday ,_______all the students are children of migrant workers,

Scientists are convinced the positive effect of laughter physical and mental health[ ]

into sports.When young ,he had a_____about becoming a famous football player.

– How’s your new class teacher?– We ______ ask for a better one. All my classmates love him so much.

Engines are to machines ____ hearts are to animals.