The national Education Department says school safety has set off alarm bells with frequent serious accidents_________students got injured or even killed.

I don’t know much about computer.—I don’t know,. Let’s go and ask our computer teacher for help.

Have you seen Mr. Black these days, Jack? —-Yes, I met him when I ________ in the street yesterday.

Look at the lady ______ name is Dochi.[ ]

．______ surprised the family most was ________the girl played basketball very well．