About ……….of the housing units in big cities are substandard.
a) 30%
b) 50%
c) 80%
d) 90%
The migration from rural areas creates shortage of labor in……….sectors.
a) agriculture
b) education
c) industrial
d) banking
Deforestation
brings about:
a) increased sunlight
b) weeds or unwanted plants control
c) increased grazing area
d) soil erosion
