—Were you at home at 9:00 last night? I called you but nobody answered. —Sorry, I ________ at that time.
—Do you know________Amy came to school this morning? —Her bike was broken,so she had to walk.
My friend Frank sings well,and he is________good at playing the guitar.
—Have you ever heard of Jeremy Lin? —I only know he is________basketball player.
Mr.Brown always makes his class________and keeps his students________in class.
Computers________widely in our daily life.