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题目内容
（上海开放大学-大学英语2）
A: My flight number is CA 921. Do I have to arrive at the airport at 10 o’clock?
B: Yes. You ________ be there two hours earlier before it takes off.
A)
will
B)
can
C)
must
B: Yes. You ________ be there two hours earlier before it takes off.
A)
will
B)
can
C)
must
参考答案