你自己挑吧.
1. It was kind of her sister to invite him to stay a little longer.
2. It was a pity that you couldn't pass the final exam.
Someone is ringing the doorbell. Go and see who it is.有人在按门铃.去看看是谁
What’s this?这是什么?
It’s a book.这是一本书.
What a long way it is from Beijing to London! 从北京到伦敦真远
It's best to plant trees in spring because it's warmer.春天是植树的最佳时节,因为天气更暖和
It was I who met him in the park last week. 是我上星期在公园遇到他的.
The frog is not a warm-blooded animal. It is a cold-blooded one.青蛙不是温血动物,它是冷血动物.
My pen is missing. I can't find it anywhere. 我的笔丢了,我哪儿也找不到它了.
I won't be back tonight. Please tell my wife about it .我今晚不回来了,请你向我妻子说一声.
I was disappointed with the film. I had expected it to be much better. 我对这部电影很失望,我曾盼望它更好.
Tom's mother kept telling him that he should work harder, but it didn't help.汤姆的妈妈不停地告诉他要努力,但这没起作用.
-Who is knocking at the door? —谁在敲门?
-It's me. —是我.
I had a talk with the student. It was very helpful to her. 我和那个学生谈了次话,对她非常有帮助.
It happened during my stay in the United States. 事情发生在我在美国的时候.
-Whose exercise book is that? —谁的作业本?
-It's his . —是他的.
-What's the time? —“几点了?”
-It's half past ten. —“十点半”（指时间）
It is late autumn now. 现在是深秋.（指时间）