15．You need to have your eyes checked twice a year．Howoftendo I need to have my eyes checked?——青夏教育精英家教网——

15．You need to have your eyes checked twice a year．（对划线部分提问）
Howoftendo I need to have my eyes checked？

14．My mother ______ herself busy since she retired from work．（　　）

13．You had better _____ wine because you have to drive back home．（　　）

12．Tina __________ as a physics teacher for over twenty years．（　　）

11．Don′t make （not make） a noise．They are busy with their work．

10．The Chinese farmers _____ how to grow rice by the end of 21st century B．C．（　　）

9．-Hello，Jack．I haven't seen you for long．I am calling to check _________ you are．
-Very well．I'm glad you called．（　　）

8．----Boys and girls，_________ in the rivers or pools．It's not safe．
----We won't，thank you．（　　）

7．_________ this rock music，please．I'm afraid some people can't stand the noise!（　　）

6．Don′t smoke（ not smoke ） here，Rick．Smoking is not allowed in public places．

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