Oh okay. Both ways are grammatically correct then.

-The first sentence implies that he has shown improvement within himself, like if he understands something better now than he did before. -The second sentence implies that he is one out of two or more people, and understands it best.

"schedule" be plural, since the subject is "we", and "we" means more than one person We should take time out from our busy schedules to look for a caterer

the refers to a specific thing, while a refers to something in general i like the story ((this means you're talking about a particular story)) i like a story ((this means you like stories in general)

what about and how about are very similar, and can be used interchangeably, but I think what about usually refers to someTHING, and how about usually refers to someONE eg: What about the chickens? What about the test? eg: How about

Your sentence is right both ways! I immigrated to the US from Canada I emmigrated from Canada to the US