Since Ms. Evans______her disappointment regarding the service, the store manager has been careful to keep his eyes on the staff’

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问题 Since Ms. Evans______her disappointment regarding the service, the store manager has been careful to keep his eyes on the staff’s behavior.

选项 A、shows
B、is showing
C、will be showing
D、showed

答案D

解析 语法:时态1.这是一道时态选择题,选项均为动词的不同时态。2.主句动词为现在完成时(has been),since引导的从句应使用过去时。
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