[ Passive Voice ]
Thousands of customers ______ about their phone service by filling out questionaires online.
A. were surveyed
B. were surveying
C. had surveyed
D. had been surveying
Select your answer:
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Subject-Verb Agreement › ViewEither my aunts or my uncle (is/are) going to be at my party.
A. Is
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When walking along the cliff, you must be ………………. not to fall.
A. careful
B. carefully
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