A medical team was sent to Japan by air five hours ago.-So they ________ have arrived by now.The flight usually takes four hours or so.[ ]

They worked hard_____they finished their work ahead of time

I can’t remember the day ______ we first met in China.

through Mary, ______ was working at a high school, ______ you got to know Tom

His parents are going to __ a computer ___him.