They have been doing morning exercises they up.

I left my keys in the room yesterday. I had to get in_____ the window.— It’s dangerous to do that.[ ]

I don’t know if Mr Wang ________here tomorrow . If he ______ , please tell me.

_______ of the watches would you like?—I’ll take ________ of them, so I can give one to my sister.

Your father looks tired! — Yes, he worked for _________ after twelve o’clock.