Question

complete the sentence with the best relative pronoun.

in 1733, english theologian and chemist joseph priestley invented soda water,
bubbles and carbonation he mistakenly thought could cure scurvy, a disease
caused by a deficiency of vitamin c.

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Explanation:

En este caso, se trata de una cláusula relativa no definida. El antecedente es "soda water", que es un objeto. En inglés, para antecedentes no definidos y que son objetos, se usa "which".

Answer:

which