The answer is D. Exposition
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Gulliver's plan to escape from Lilliput preparation for Gulliver's lengthy imprisonment Lilliputian inventory of Gulliver
Explanation:
waste away is become weak and thin
taken aback is being shocked
slop around is be lazy or relaxed
pop on is to wear something
iron out us get rid of problems
let somebody down is fail to support someone
let somebody off is to not punish
let out us come to an end