His father has worked in this factory _____ he came here in 1980.A. since B. for C. when
—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.