I don’t know ______ he will come tomorrow. ______ he comes , I’ll tell you.
Simon’s MP4 player isn’t _______ expensive _______ mine.
He can’t ___________ the difference between right and wrong.
Put ________ waste bag into the dustbin, please.— It’s not ________ waste bag. It’s my shopping bag.
Do you know this boy?He works really___.–Yes, I can ___ see him play. He always studies.