网址：http://m.1010jiajiao.com/timu3_id_3211883[举报]
But______ they grow they make sure that what is left in the ground after harvesting ______ a natural fertilizer for the next year’s crop.
A. whatever; become B. whichever; become
C. whatever; becomes D. whichever; becomes
But______ they grow they make sure that what is left in the ground after harvesting______ a natural fertilizer for the next year’s crop.
A. whatever; become B. whichever; become
C. whatever; becomes D. whichever; becomes
观察下列句子中的画线部分，试着归纳其中所包含的句型结构。
1．He wants everyone to call him a farmer, for that’s how he regards himself．
2．Using his hybrid rice farmers are producing harvests twice as large as before．
3．And he would rather keep time for his hobbies．
4．It seems a strange name since all crops are organic no matter how they are produced．
5．But whatever they grow they make sure that what is left in the ground after harvesting becomes…