开角型青光眼可以（）

A．无任何症状、不知不觉中失明

B．头痛、恶心、呕吐、眼压升高而失明

C．晚上看电视后眼发胀、视力下降

D．眼胀、虹视、恶心、呕吐、眼压升高

E．以上都不是

句型转换。

1. It's necessary to study hard in the school.(同义句)

    ______ ______ study hard in the school.

2. We should watch TV too much.(否定句)

    We ______ ______ TV too much.

3. They went to the park yesterday.(划线部分提问)

     ______ ______ they go to the park?

4. He knows how to look after pets.(一般疑问句)

    ______ he ______ how look after pets?

5. You should take your dog for a walk every day. (同义句) 

    ______ your ______ for a walk every day.