读下面气温曲线图及降水柱状图，回答：

“生活情况愈艰难，我愈感到自己更坚强，甚至更聪明。”高尔基的话表明（    ）

①逆境是磨炼人的最高学府                               ②挫折会打击人们的自信

③理想的实现离不开艰苦奋斗和坚强的意志   ④顺境也会让人精神懈怠

呼吸的全过程包括下面四个环节，其正确顺序是（　　）

①肺泡内的气体交换 ②组织细胞里的气体交换③肺的通气④气体在血液中的运输．

根据对话内容，将方框内符合对话情境的句子抄写在对话空白处，使对话恢复完整，选项中有两项是多余的。

（An interviewer is interviewing a Chinese student who is studying in America.)

A=an interviewer       B=a Chinese student

A: Excuse me,   ____     

A: How long have you been studying here?

B: ____      

A: How are you getting on with your study?

B: Very well.

A:  ____                    

B: I'm going back to China.

A: Why?

B: Er, you know,China is developing faster and faster.  ____ 

A: Any more reasons?

B: Yes, I'd like to spend more time with my parents.

A: Wow! Good! Caring for parents comes first in China.  ____ 

B: Thank you.