问题
选择题
—It's very important for you to arrive on time.
—I ____ be there at seven o'clock, I promise.[ ]
A. will
B. can
C. must
D. should
答案
答案：A
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—It's very important for you to arrive on time.
—I ____ be there at seven o'clock, I promise.[ ]
A. will
B. can
C. must
D. should
答案：A