Announcements were made by deans and officials, and identifications were verified by proctors, who then handed out the exams.
A. Correct.
B. Deans and officials made announcements, and the proctors verified identifications and handed out the exams.
C. Announcements were made by deans and officials before the proctors verified identifications and handed out the exams.

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Verb Tense, Pronouns and AntecedentsWish + Verb 2Basic TensesOffer and SuggestionTenses PracticeGrammar - Present and Past PassivePast ModalsSpellingReporting VerbsFuture Tense and ConditionalsOther quiz:
Conjunction › ViewIn golf you hit the ball ___ a club.
a. at
b. by
c. with
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This soap opera might be a little boring but it helps me …………………………………………….. .
A. take my mind off things.
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A. walk
B. walking
C. walks
Conjunction › View
Choose the correct pair of correlative conjunctions.
The boy is _____ mean _____ unkind, in fact he is a friend to everybody.
A. both/and
B. neither/nor
C. whether/or
D. either/or