(36) PILOT:PLANE ::
- (a) driver:car
- (b) captain:boat
- (c) engineer:train
- (d) cyclist:bicycle
(37) RAIN:IRRIGATION ::
- (a) sun:photosynthesis
- (b) wind:pollination
- (c) snow:insulation
- (d) river:transportation
(38) LIBRARY:BOOKS ::
- (a) bank:money
- (b) gallery:art
- (c) school:teachers
- (d) restaurant:chefs
(39) WAVE:OCEAN ::
- (a) leaf:tree
- (b) dune:desert
- (c) peak:mountain
- (d) drop:rain
(40) SOLDER:JOIN ::
- (a) lubricate:reduce
- (b) cut:divide
- (c) glue:stick
- (d) hammer:build
