一杯酒精减少一半后，则（  ）

A:Hey, Peter! You look tired____?

B:I didn't get enough sleep last night.

A:Were you just doing your homework last night?

B:____ Mountains of homework, math, chemistry, Chinese … I didn't finish it until midnight.

A:Poor guy! No wonder you don't look well.

B:You know, less sleep is bad for my health. I am not as energetic (精力充沛) as before. Can you give me some____?

A: Sure. I advise you to make a plan before doing your homework. First things first. And you'd better do some outdoor sports.

B:____ I am going to follow your advice. Thank you.

A:Um … If you are too busy on weekdays, just relax yourself at weekends.

B:Weekends? No kidding. I have to take after-school classes at weekends.

A:You do?____?

B:Because my parents want me to get into a good high school.

A:Yes, I guess that is the reason. Perhaps you should talk to them and explain that health is the most important.

B:You are right. Thanks for all the good advice. I'll try to talk to them.

①b＜1；②c＜2；③0＜m＜ $\frac{1}{2}$ ；④n≤1．

则所有正确结论的序号是____．

完形填空

    A lady wanted a birthday gift from her husband. For many months she had liked a beautiful 1, and knowing her husband could 2 it, she told him that was all she wanted. On the morning of the 3, her husband told her how 4 he was to have such a good wife, and how much he loved her. He 5 her a beautiful gift package. She opened it and 6 a Bible. 7, she raised her voice and said to her husband, “With all your money, you give me a Bible?” She was so 8 that she left him.

    Many years passed and the lady was very 9 in business. She owned two large companies. She 10 her husband was very old, and thought perhaps she should go to 11 him. But before she could, she 12 a letter telling her that he had died, and gave all of his possessions to her. She needed to come back and 13 things.

    When she arrived at his house, sadness 14 her heart. She saw the still new 15, just as she had left it years before. With 16, she opened it and began to turn the pages. A ring 17 from the Bible to the floor and a 18 could be seen. She picked it up and found it was the ring she wanted in those days. And on the card was the date of her birth, and the words “LOVE U ALWAYS”.

    19 your gift is not packaged the way you want it, it's because it is better packaged the way it is! Always appreciate little things; they usually lead you to bigger things! The best and most beautiful things in the world cannot be seen or even touched for they must be felt with the 20.