What are the keywords in the following sentence? cut flowers from supermarkets can last at least a week and come cheap
come, cut, flower

What are the keywords in the following sentence? Some soldiers run to a trench for protection and load his firearm.
firearm, run, soldier, trench

What are the keywords in the following sentence? the logo is seen reflected in a pair of sunglasses .
pair, reflect, sunglass

What are the keywords in the following sentence? He smiles, then shifts his gaze to someone, who stares at him with a confused expression.
expression, gaze, shift