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The voice of the verb tells whether the subject performs or receives the action. These voices are active voice and passive voice. Since active voice depicts that the subject performs the action, then the answer is passive voice. Passive voice depicts that the subject receives the action expressed by the verb.
The first gap is best filled with "resembled" (Sebastian comments here that many people believed that his sister was similar to him in the looks)
The second gap is "remembrance" - he means here that he cries after her (the more refers to more salt water, that is his tears)
The gist could do him some harm
