题目:When the airplane takes off, the passengers are told to _______ their seat belts. (单选题)
A. fountain
B. fix
C. tight
D. fasten
答案:评论后可见此内容
推荐使用我们的公众号搜索题目,题目更全,检索更方便。支持语音、图片、文字等多种搜索方式。