There are far too many people sleeping ________ on the streets of London and other big British cities.  wild  rough  hard  fierce

To fill in the blank in the sentence "There are far too many people sleeping ________ on the streets of London and other big British cities," the most appropriate word among the given options is "rough."

Explanation:

1. Word Meaning:

   • Wild: Suggests a lack of control or domestication, not applicable here.
   • Rough: Implies a harsh or uncomfortable condition, suitable for describing people sleeping on the streets.
   • Hard: Generally refers to physical firmness; not the best fit for the context of sleeping conditions.
   • Fierce: Suggests intensity or aggression, which does not fit the context.

2. Context:

   • The sentence addresses the unfortunate situation of homelessness. "Rough" effectively conveys the discomfort and harshness of sleeping outdoors.

Final Answer

The sentence should read: "There are far too many people sleeping rough on the streets of London and other big British cities."