Salt can be removed from seawater.But the present methods ar

Salt can be removed from seawater.But the present methods are so expensive that it is not practical to the salt out of the great quantity of water that would be .Men in boats at sea have been able to drink seawater from which they removed the salt using the sun’s rays.You can do the same thing at your homes.Place a large flat pan with low sides on the ground.the pan with salty water.Place a piece of glass on the pan so that one end is higher than the other.Allow the lower section of the glass to extent the edge of the pan.Put another pan under the lower section of the glass to collect the fresh water.As the sun warms the glass,the water from the pan is drawn up to the upper side of the glass,where it gathers in drops of liquid.As more and more drops collect on the glass,the water runs down into the pan.This water will be clear and without salt.When all water has been drawn out,salt will cover the of the pan.Scientists who study the sun are trying cheap ways to use this method in many experiments concerned with making seawater .
(1) (A)take (B)bring (C)keep (D)help
(2) (A)polluted (B)required (C)produced (D)recycled
(3) (A)in (B)by (C)fpr (D)with
(4) (A)Put (B)Fill (C)Pour (D)Setting
(5) (A)beyond (B)below (C)above (D)down
(6) (A)salty (B)fresh (C)clean (D)warm
(7) (A)small (B)swallow (C)collecting (D)gathered
(8) (A)edge (B)side (C)floor (D)bottom
(9) (A)to discover (B)to improve (C)setting up (D)taking up
(10) (A)helpful (B)into use (C)harmful (D)expensive
0

1.A 2.B 3.B 4.B 5.A
6.B 7.C 8.D 9.A 10 B