---How long ____ you ____ in Singapore?---For just the weekend. I’ll be back next Monday morning.
Helen always helps her mother even though going to school_______ most of her day.
She will fly to Washington, ________ she can enjoy herself.
These experiences ______ me _____ the drug’s harmful effects.
— Did Alan enjoy seeing his old friends yesterday? — Yes, he did. He _____ his old friends for a long time.
— Have you handed in your schoolwork yet? — Yes, I have. I guess it ______ now.