[单项选择](Annoying) at the long check-out lines, the shopper began (to sigh) loudly, tap his (foot), and (glance) at his watch. A. Annoying B. to sigh C. foot D. glance
参考答案:A 答案解析:应为annoyed。完整的句意为the shopper was annoyed at the long check-out lines。
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