lt's easy ____________
[     ]
A. to stay health
B. stay healthy
C. to stay healthy
D. stay health
They stayed up until midnight _____ the old year out and the new year in.
[     ]
A. and saw
B. to see
C. seeing
D. for seeing
She can't help _____ the house because she's busy making a cake.  
[     ]
A. to clean                  
B. cleaning  
C. cleaned                  
D. being cleaned