★ Verb Tense, Pronouns and Antecedents
Detection programs are available that searches for and then destroys computer viruses.
A. NO CHANGE
B. searches for and destroys
C. search for and destroys
D. search for and destroy
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As we __________ for the train, we ate our breakfast.
A. were waiting
B. are waiting
C. do wait
D. have waited
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