A.the rain is spread out in a year |
B.the rain falls only in a few weeks |
C.there is little rain in a year |
D.it is dry all the year round |
A.sand piles up gradually |
B.there is plenty of rain in a year |
C.the sea has dried up over the years |
D.pieces of rock get smaller |
A.too much sand |
B.more sand than before |
C.nothing except sand |
D.something else besides sand |
A.there is no rainfall throughout the year |
B.life exists in rough conditions |
C.all sand dunes are a few feet high |
D.rocks are worn away only by wind and heat |