2. 外语
  3. A lockout occurs when management______ workers from returning to work.

A lockout occurs when management______ workers from returning to work.

admin2019-07-01  70
问题 A lockout occurs when management______ workers from returning to work.
选项 A、prevents
B、preventing
C、prevention
D、prevented
答案A
解析 The simple present verb prevents agrees with the verb in the first clause, occurs.
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