Sentence improvement (partitive with a superlative): ensure plural head noun after “the easiest of …” Original sentence: "The easiest of the ___ to do is to ask the address to the postman." Choose the option that correctly completes the partitive phrase.

Given data & target

• We need a grammatically correct continuation after “The easiest of the …”.

Concept/Approach
After “the easiest of the …”, the head noun must be plural: things. The natural, concise completion here is “the easiest of the things to do …”.

Note
Although idiomatic English would say “ask the postman for the address,” the test item focuses solely on fixing the partitive phrase.

Option analysis
of the things to do — correct plural head; preserves meaning. ✅among the things did / thing to be done / of all the things done — tense/number/meaning issues.

Final Answer
“The easiest of the things to do …”