あなたはこのチャンスを活かすべきだ。

you (referring to someone of equal or lower status); dear (what a wife calls a husband)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

chance; opportunity

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to make (the best) use of; to leverage (skills, attributes, experience, etc.); to capitalise on (experience, etc); to let live; to keep alive; to revive; to resuscitate

shall; should; must

be; is; indicates past or completed action; indicates light imperative