两道英语题Fresh fruit and vegetables____long on hot summer daysA,

两道英语题
Fresh fruit and vegetables____long on hot summer days
A,can't be kept B,don't keep C,won't be kept D,are not kept
为什么选C不选A?
you may__a more practical way of solving the problem will soon come up.
A,rely on B,rely on that C,rely that D,rely on it that
为什么选D