Passive Voice : Expansion And Review Test

The correct answer is "may have disappeared." This is because the sentence is discussing a possibility in the past, indicating uncertainty. The phrase "may have" is used to express this uncertainty, and "disappeared" is the correct past participle form of the verb "to disappear."

The correct answer is "have been found." This is because the sentence is in the present perfect tense, indicating that the action of finding remains of the plane and people is ongoing or has happened in the past with a present impact. The phrase "so far" further suggests that the search for remains is still ongoing.

The correct answer is "are located." This is because the subject "The Caribbean Islands" is plural, so it requires the plural verb form "are." Additionally, the verb "located" is used to describe the position of the islands, indicating that they are currently situated in a specific area.

The correct answer is "are / unsolved" because the question is asking for the number of mysteries that are currently unsolved. The word "are" is used to indicate the present tense, and "unsolved" is the appropriate adjective to describe the mysteries.

The correct answer is "is going to be constructed." This answer is appropriate because the sentence is discussing a future event. The use of "is going to" indicates a planned action that will happen in the future. The phrase "is going to be constructed" suggests that the new building has not yet been built but will be in the future.

The correct answer is "was being opened". This is the correct answer because it indicates that the action of opening the safe box was in progress at the time the police arrived and the shooting began. The use of the past continuous tense "was being opened" suggests that the opening of the safe box was interrupted by the arrival of the police.

The correct answer is "had / analyzed". This is because the sentence is in the past tense and the action of analyzing the DNA material occurred before the action of being the chief of the police department. Therefore, the correct verb tense to use is "had analyzed".

The correct answer is "to have disappeared." This is because the sentence is discussing a belief about the Mayas, indicating that something happened in the past. The phrase "to have disappeared" is the correct form of the verb to indicate an action that occurred before another event (the arrival of the Spaniards).

The sentence "They think don't really exist pure Mayas since they must have mixed with other cultures" is not correct because it has incorrect word order and grammar. The correct sentence would be "They think pure Mayas don't really exist nowadays since they mixed with other cultures."

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