Are you available at 3 tomorrow afternoon? –Sorry, I ________ a meeting at that time.

_____ today –It’s Monday.

He got himself into a difficult situation________he must make a final decision[ ]

Hello, Judy. Long time no see. Just check ____ everything is going.— Very well. Hope all is well with you and your family as well.

Luo Yang devoted all his life _________for China Nation Aviation(中国航天).