The teacher asked us to keep quiet.Which kind of structures does the sentence belong to?
---- Look at the sign on the right! ---- Oh, smoking ___ here.
---- ___ watching English-language TV to practice listening? ---- Good idea. I think it helps.
Could you say it again? I can’t understand ___ you are talking about.
---- I like playing football very much. ---- Why don’t you ___ a football club?
--- Do you learn math ___ asking the teacher ___ help? ---- Oh, yes. It helps a lot.