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题型：单选题题类：真题难易度：普通

Over fifty countries _______ the AIIB(亚投行) so far.

A、joined B、was joining C、had joined D、have joined

举一反三

— I wonder what Mr. Wang asked you just now?

— He asked ________ .

—What did the teacher say to you?

—He asked me ______.

—I wonder if Tom this afternoon.

—Don't worry. I will tell you as soon as he .

Tom didn't listen carefully, so he failed to hear what the teacher {#blank#}1{#/blank#} (say).

—Excuse me, sir. Could you tell me ______?

—It landed at 7:30 in the morning.

哥白尼(Copernicus)发现地球是围绕太阳运行的。

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