问题
选择题
You must keep your eyes if you are going to make your trip enjoyable and worthwhile.
A, opened, to be B, open, to be C, opened, be D, open, /
答案
答案：D
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You must keep your eyes if you are going to make your trip enjoyable and worthwhile.
A, opened, to be B, open, to be C, opened, be D, open, /
答案：D