The manager was concerned to hear that two of his trusted workers . A. will leaveB. are le

问题补充：

The manager was concerned to hear that two of his trusted workers .

A. will leave

B. are leaving

C. have left

D. were leaving

答案：

A. will leave

B. are leaving

C. have left

(答案→)D. were leaving

解析：考查动词时态。此处用过去进行时表示过去将来时。这里were leaving表示：过去要离开。句意：听到自己最信任的两个职员要离去，经理很关注。