当你的老师向你介绍一位新同学时,你应对你的新同学说:________________________
Her singing lessons her five hours a week.
He can’t state clearly how long he has ___________ the bicycle?
----How can I improve(提高) my listening skills? -----_______________more.
--My aunt ______________ Singapore for a holiday. ---It’s a beautiful country. I ___________there twice.
Look! __________ high speed the roller coaster is __________.