消费者维权运动形成一股世界性潮流,联合国高度重视,于1985年通过了
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 __________.