单选题 Management let the employees ______at two o'clock.

A、 (A) leave
B、 (B) left
C、 (C) was leaving
D、 (D) was left

【正确答案】 A

【答案解析】The employees are the ones who are leaving, so the simple form of the verb is used. Choice (B) is the past tense. Choice (C) is the past continuous. Choice (D) is the past tense in the passive form.