问题
选择题
—The design had to be given up at last.
—I know.Even experienced designers ________ make mistakes.[ ]
A. can
B. ought to
C. must
D. need
答案
答案：A
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—The design had to be given up at last.
—I know.Even experienced designers ________ make mistakes.[ ]
A. can
B. ought to
C. must
D. need
答案：A