---Mom, I was the first to reach the top of the mountain.---Good job, Jack! I’m of you.
—It is rather cold here.Shall we light a fire(点火)? —No,you ________,because things here are easy to catch fire.
My sister is ________ a new song.Me,too.
We arrive ________ the Baiyun Airport five minutes late.
Please ________ in the classroom.
Which of the following signs means “No photos”?