<em><u>Definitions:</u></em>
<u>Querulous:</u> Whining in an annoying disruptive behavior
<u>Cupidity</u>: An obsessive need or addiction to money or worldly possessions; greedy
<u>Credible:</u> Truthful or honest
<u>Impudence:</u> Bold in a cocky or demeaning way; having a disregard for others
<u>Meritorious:</u> Deserving of high praise, or rewards
<em><u>Answers:</u></em>
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The positive qualities would be:
<h3><u>
Credible and meritorious</u></h3>
The event that is foreshadowed is the dramatic improvement in Colin's health.
Like Mary before him, Colin's health will be improved by his exposure to the outdoors, the sun and fresh air, and the Secret Garden. Eventually, he will no longer need his wheelchair and, with the arrival of spring, he will walk again through the garden.
Forget about him. He cheated on you, which means he's not worth it to begin with.
Most jobs would be taken over by robots and AI