He hasn't...
explored a jungle.
Last year, I
walked under a waterfall.
Yesterday I...
canoed on a river.
He's...
explored a cave.
He's...
dived near a coral reef.
She's...
climbed a cliff.
She hasn't...
explored an island.
He's...
walked on the moon.
She's...
climbed a volcano.
Last summer, I
trekked across a desert.
