Tim plays computer games too much. — That’s why his mother __________ his eyesight.[ ]

Teenagers must_______ the computer games.

Do you find _______ difficult to be independent(独立的)?.

Alan, it’s late. Why not go to bed?— Jenny hasn’t come back yet. I _______ for her.

The lady _________ dancing as a hobby in her sixties, and she is really good at it now.