"to disappoint someone" means? - a) to let someone down - b) to blame someone or something
a) to let someone down
"to think about something for a long time (often meaning you can't make a decision about it)" means? - a) to (not) live up to your expectations - b) to dwell on something
b) to dwell on something
"to do your best" means? - a) to try your hardest - b) to dwell on something
a) to try your hardest
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