Jack is a student and studies at the NO.

Tom, you look tired this morning. What’s wrong? —I was so busy that I didn’t go to bed _______ 12 o’clock last night. [ ]

Meimei dropped_____her former Chinese teacher’s home when visiting China last time.[ ]

He liked my bike so much that I had to lend it ______ him. [ ]

Many famous movie stars attended the news briefing (新闻发布会), Jackie Chan and Jet Li. [ ]