We were anxious about you．You home without us.
A. shouldn’t leave; tell
B. mustn’t leave; tell
C. shouldn’t have left; telling
D. can’t have left; telling
网友回答
A. shouldn’t leave; tell
B. mustn’t leave; tell
(答案→)C. shouldn’t have left; telling
D. can’t have left; telling
解析：考察情态动词用法。要特别注意“情态动词+have done”是对过去情况的推测或者虚拟，“情态动词+动词原形”是对现在情况的推测或者虚拟。本句中的were说明是对过去情况的推测或者虚拟，shouldn’t have done本不应该做某事实际上却做了；can’t have done不可能做了某事。第二空介词without后面接动名词doing的形式。句意：我们很担心你，你本不应该一句话没有说就离开的。故C正确。