— We must______ using plastic bags in order to protect our earth..— Yes, we mustn’t _________any more.
Tom can play the guitar, ______ he can’t play it ______.
Li Lei can ______ English. But his brother can’t.
I sometimes play volleyball ______ half an hour after school.
---What do you ______ the story. ---It’s boring.
Miss Read is good _____music. She can be good ______ children in the music club.