Write
a) this or these: 1)...schoolmates, 2)...dolphin, 3)....mi
ce, 4)....gentleman
b) that or those: 1) ... baby, 2)....monkeys, 3)...woman, 4).... children

a) 1)these schoolmates 2) this dolphin 3) these mice 4) this gentleman
b) 1) that baby 2) those monkeys 3) that woman 4) those children.