Which word best completes the sentence to mean 'curious'?

The dative case form of the personal pronoun 'du' (you) is 'dir'. In the sentence, 'dir' is used as the indirect object, receiving the action of the verb. Here, the verb 'gegeben' ("given" - to give) requires an indirect object to indicate to whom the book is given. 'Du' changes to 'dir' in the dative case to reflect its role as the recipient of the action in the sentence.

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• Dative Case
• Personal Pronouns Cases

The correct definite article for masculine nouns in the genitive case is "des." Therefore, the sentence should be "Das ist das Buch des Lehrers," which translates to "That is the teacher's book" in English.

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• Genitive Case
• Personal Pronouns Cases

The dative case form of the personal pronoun 'wir' (we) is 'uns'. In the sentence "Der Lehrer hat uns die Hausaufgaben aufgegeben," 'uns' is used as the indirect object, receiving the action of the verb. Here, the verb 'aufgeben' (to assign) requires an indirect object to indicate to whom the homework is assigned. 'Wir' changes to 'uns' in the dative case to reflect its role as the recipient of the action in the sentence.

• Dative Case
• Personal Pronouns Cases