Surface area-total area of iron sheet: 50x35= 1750 (square centimeter) minus square area: 5x5=25 (square centimeter) minus four square areas: 25x4= 100 (square centimeter) Box surface area:1750-/kloc-0.

Volume-The cuboid is 5cm high, 35-5-5=25 (cm) wide, 50-5-5=40 (cm) long and 25x5x40=5000 (cm 3) in volume.

Language: A: The injured man may regard himself as the aunt's child, and take care of her, not her relatives.

Lao Wang will take care of Xiao Jinhua for his mother.

Volunteers will take care of the eldest sister-in-law

A: With the encouragement of the Korean people, the volunteers fought bravely to help them resist aggression and defend North Korea.

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