据句意和首字母提示补全单词。

l. There is n_____ much wrong with you .Just  have a rest.

2. Lei F eng always helped others in his l_____. We should learn from him.

3.—Who can s_____ the math problem? 

  —I think everybody can.

4. The region p_____ over 50% of the country's wheat.

5.ln his s_____   time ,he loves playing the violin  and listening to music.

6. Yuan Long ping is now working on d_____ super hybrid rice.

测量用的检水尺（）。

A、尺带扭折弯曲不影响使用

B、在有效期内，虽刻度不清但是可以继续使用

C、底部损坏不影响使用

D、应有有效的检定证书