【题目】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】D
【解析】句意：听到自己最信任的两个职员要离去，经理很关注。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。故选D。