Here are some examples :
1) The mangoes (will ripe/ripe/will ripen) over time said John.
2) The least considered in the latest Terrorist attacks (are/were/was) the innocent victims.
My choice for 1) would be:
"ripe" if it is considered as a fact, so present tense is good choice.
"will ripe" if it is considered as an opinion of John rather than a fact; the sentence is in the past tense, so past tense is good choice.
My choice for 2) would be:
"were" if it is in newspaper article and it describes a past event.
"are" if it is live reporting of a statement.
I have checked them in this checker, and results show that all of the options are correct.
EDIT1 :And what about:
This (calls/calls for/calls against) a treat.
Uprooting plants (is/are/have been/was) like uprooting your life.
Also please suggest most critical points to consider if possible while answering such questions and apologies for not following the standards for asking the question, i am a newbie so i am getting acquainted with it.But I have done research for these questions and did not get the answer , that's why asked here.