In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
Passage:

Those of us wholive in (1)............. covered with forests and surrounded (2)............ hills may findit difficult to (3)............. what a desert is really like. The (4)............. belief is that it is (5).............. endless stretch of sand where no rain falls and, therefore. no vegetation grows.