写出反义词。

熟悉—____   　  相信—____      　 开始—____

____

A: How nice to see you back, Li Lei!

B: Hi, Judy! I just came back yesterday.

A:____

B: Wonderful! I've been to many places of interest and I enjoyed myself in Disneyland.

A:____

B: Not really. Sometimes I got into trouble. They spoke too quickly and I couldn't have long conversations with the people there.____

A: Yes, I agree. I know English is very important, but I often feel sleepy in English classes.____

B: I'm afraid, too. And it's very difficult for me to remember new words.

A: Me, too. I don't know what to do____

B: Don't let these difficulties discourage(使气馁) you. Remember: where there is a will, there is a way.

A: Sure, I won't. I'll try my best.

B: So will I.

A. How was your trip?

B. At times I feel like giving up.

C. What did you buy in the USA?

D. I'm really afraid of the final exam.

E. I think I should work harder in English.

F. Could you make yourself understood in the USA?

2011年10月17日，重庆奉节县大树镇富发煤矿发生瓦斯爆炸，造成重大人员伤亡。这里所说“瓦斯”的主要成分是（）

It's important for us to be healthy. But how can we keep healthy? First,you should eat fruit and vegetables three or four times a week. Then eat some tofu every day because it's good for people, both the young and the old. Milk is also necessary(必要的），especially for women. So you should have milk twice a day. It can help you to be strong. Next, doing more exercise is better. You can do morning exercises or evening exercises. After supper you should take a walk.