单选题Something must have happened on their way. Or they _____ by now.Ashould have arrivedBshould arriveCwould have arrivedDwould arrive
单选题
Something must have happened on their way. Or they _____ by now.
A
should have arrived
B
should arrive
C
would have arrived
D
would arrive
参考解析
解析：
句意：他们在路上肯定出什么事了。否则他们现在应该到了。should have done表示应该发生而没有发生，故为A。
句意：他们在路上肯定出什么事了。否则他们现在应该到了。should have done表示应该发生而没有发生，故为A。
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