They started off at about 5 o’clock in the morning . They should there by now.A.
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They started off at about 5 o’clock in the morning . They should______there by now.
A.arrive
B.have been arriving
C.have arrived
D.be arriving
试题答案
C
考查虚拟语气。句意：他们在上午大约五点钟出发。到现在他们应该到达那儿了。“should+have+done”意思是“本来应该做某事，而实际没做。故选C。