1.You'd better go to school at once.(否定句)

楼主第二大题第四小题,是不是少了个it?
楼上的有位第二大题第六小题either or错了的,也有位not only but also超空了~
1.You'd better go to school at once.(否定句)
You'd better not go to school at once.
2.There's (something) wrong with my bike.(就括号提问)
What is wrong with your bike?
3.I don't know when and how i should leave for Nanjing.(简单句)
When should I leave for Nanjing?And how should I leave for Nanjing?
4.There are (50) students in the classroom.(就括号提问)
How many students are there in the classroom?
5.There is plenty of rain in the south of China.(反意疑问句)
There is plenty of rain in the south of China,isn't there?
二、
1.His sister does eye exercises every day.（反意疑问句）
His sister does eye exercises every day,(doesn't she)?
2.People speak Japanese in Japan.（改为被动语态）
(Japanese is spoken) in Japan.
3.It's eight thirty now.（改为同一意思的句子）
It's (half past eight) now.
4.How beautiful the park is!（感叹句）
(What a beautiful) park it is!
5.He began to learn how to use a computer when he was five years old.（同意句）
He began to learn how to use a computer (at the age of five).
6.Mrs Smith is my teacher.She is also my good friend.（合并为一句,使句意不变）
Mrs Smith is （both) my teacher (and)my good friend.
三、
1.Li Lei does his homework at seven.（改为否定句）
Li Lei （doesn't do) his homework at seven.
2.My teacher had lunch at school yesterday.（改为一般疑问句）
(Did) your teacher (have) lunch at school yesterday?
3.They write to their friends (once a month).（对括号提问）
(How often do) they write to their friends?
4.When does he get up?Do you know?（改为宾语从句）
Do you know (when) he (gets up)?
5.The boy is very strong,he can carry the heavy box.（合并为一句,使句意不变）
The boy is (strong enough to) carry the heavy box.
OK!,终于写完了,楼主有哪题不明白的可以问我原因,