#001 - Present perfect or past tense?

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ak LogoTwo days ago my dog Fritz (to sleep) all day. When he (to get up), he (to look) out of the window and (to see) that it (to rain). Since then, he (not to eat) anything. He (to be) a stupid dog all his life, and so I (not to be worried) when I noticed that he (to behave) stupidly that day, too.