试题 试卷
题型：单选题 题类：常考题 难易度：普通
—-Sorry, I didn't notice that sign just now.
-- Well, you .
—No. All we do now is to wait.
—It's fast, but expensive. So I am not sure. I take a train.
—I think you can call her to say sorry.
— It ________ be him. He has ________ to Australia.
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