26.see / hear / watch / notice sb. do  ( doing) sth. 看见 / 听见某人做某事 /正在做某事

　　能听见她在隔壁房间里唱歌吗？  Can you hear her singing next door / in the next room?

　　27.sth. be two meters (years) long (old) …两米长 /…两岁大

　　长城大约6,700 千米长。

　　The Great Wall is about 6,700 kilometers long.

　　28.It’s important / difficult / easy /convenient/ necessary / possible / impossible for sb. to do sth.   做某事对某人来说很重要 / 困难 / 容易 方便/ 有必要 / 可能 / 不可能

　　对小孩子来说，养金鱼很容易。

　　It’s easy for kids to keep goldfish.

　　对学生们来说，每天有足够的睡眠很有必要。

　　It’s necessary for students to have enough sleep every day.

　　29.One…the other…/Some… others…一个…另外一个（两个中）/ 一些…一些

　　老师进来了。我看见他一只手拿着书，另一只手里拿的什么？

　　The teacher came in. There’s a book in one hand and what’s in his other hand?

　　有的家长认为应该允许学生上网，而有的家长则不同意。

　　Some parents think students should be allowed to surf the Internet, while others don’t agree.

　　30.used to do/be…  过去常常

　　她过去常常害怕孤独。

　　She used to be afraid of being alone.