—Doctor, I am afraid I am getting fat these days. 

— _____ slim, you should change your diet and lifestyle. 

A．Keeping

B．Keeps

C．Keep

D．To keep

设计调查表时是采用一览表还是单一表，取决于（）

A.调查单位与报告单位的关系

B.方便性

C.经费的多少

D.调查项目的多少