How can you step into the lab with your shoes on? You’re _______ to take them off before you enter it. I told you so!
—I telephoned him twice and I couldn’t get through to his home. —I think the line might have been out of order, ________?
—It cost me 30 yuan to get here. —Well, it was crazy of you to take a taxi _______ you could come by bus as well.
—Will you go shopping now? —Not until I ________ my experiment.
Every child is _____ to it parents.
She forgot to tell me which bus to _____.