Bill didn't answer my phone yesterday afternoon because he ________ a speech at that time.

A.gives B.is giving C.gave D.was giving

My sister ________ the piano very well, but she didn't have much time to play last week.

A.is playing B.played C.plays D.was playing

If you don't arrive at the airport on time, you ________ the plane.

A.have missed B.missed C.miss D.will miss

Keep quiet. Mom ________ in the next room. She worked the whole night yesterday.

A.slept B.is sleeping C.sleeps D.has slept

Lynn is riding a beautiful bike. I don't know when she ________ it.

A.buys B.is buying C.bought D.will buy

After listening to those wonderful songs, people cheered him warmly ________ once.

Mike's mother sent a letter to Mike. He signed for it ________ person this morning.

I'm so sorry to take your book ________. Here you are.

A.by bike B.by mistake C.by chance D.by accident

We don't know why Tom is so worried. It's not his problem________．

A.in person B.after all C.thanks to D.at least

Jerry is _________ today. He needs to clean the blackboard and the classroom.

A.on duty B.on fire C.on business D.on sale