Questões de Caso genitivo | Genitive case (Inglês)

Observe a sentença: “Tesla's interest in electrical invention was spurred by his mother”. Diante das assertivas, assinale a alternativa correta em referência ao apóstrofo ‘s:
I. É a contração do verbo to be na 3ª pessoa do singular (he is = he’s). II. Faz parte do caso genitivo ou caso possessivo, ele indica que algo pertence (está associado) a alguém ou a uma coisa. III. É a contração do verbo to have na 3ª pessoa do singular (he has = he’s). 

Analyze the sentences according to structure and grammar use.
1. The (‘s) in “The Amazon is often called the lungs of the earth and produces 20% of the world’s oxygen.”, is the contraction for the verb to be (is).
2. In “In order to work in the park, conservationists need a reliable map. However, no map existed, and they didn’t have enough knowledge to make one on their own.”, the underlined pronouns refer to ‘conservationists’
3. The phrasal verb ‘cut down’, in the second paragraph, means to reduce the amount.
4. The negative form of “They came up with the idea of involving local tribes to help them, combining modern and ancient methods to produce a map.” is They didn’t come up with the idea of involving local tribes to help them, combining modern and ancient methods to not produce a map.
Choose the alternative which presents the correct sentences.

The sentence “Students are really the key piece to it.” (paragraph 3) can be correctly paraphrased in the following terms:

The “s” in “Alan Turing’s” (line 37) expresses the contraction of the verb to be is.

“The teen's choice of friends”. In this topic, there is an example of Genitive Case. Match the correct alternative to complete this sentence: Bia and Bella are sisters. Do you know ____________?