Sit down, Emma.You will  only make yourself more tired,________on your feet.
 
 
|   A.to keep  |    B.keeping  |  
|   C.having kept  |    D.to have kept  |  
Sit down, Emma.You will  only make yourself more tired,________on your feet.
 
 
|   A.to keep  |    B.keeping  |  
|   C.having kept  |    D.to have kept  |  
B