Question #0d447

↳Redirected from "Which following pairs of atoms, have a lower electron affinity? a) Ca,K b) I,F c) Li, Ra. I seriously don't know anything about electron affinity all ik that it can buy another element"
1 Answer
Day
Jan 12, 2018

The letters have been posted by her.

Explanation:

This in present perfect tense.
In passive the object will be subject so,"the letters"
Subject will be object so,"her"(objective form of she is her)
Verb "posted"(v3)

So,The letters have been posted by her.

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