今天的翻译题是：

1. _____________(最使我们困惑的是)is that this restaurant doesn't have any table at all.

2. Two tourists visited the service center frequently__________(投诉被收费过高).

答案解析:

1.答案: What puzzles/confuses us most

详解:
考查主语从句:汉语中的"的"字结构可以用What引导的主语从句表达，作整个句子的主语。
考查高频词汇:"使某人困惑"可译为confuse sb或 puzzle sb.。
"最"表程度，用most修饰谓语动词confuse/puzzle。

2.答案: to complain of/about being overcharged

详解:
考查固定搭配:"投诉"的表达为complain,其后跟名词时要用about或 of "收费过高"的表达为overcharge/charge too much.
考查被动语态:主语two tourists是动作overcharge的承受者，用被动语态。
考查动词不定式: visit的宾语后出现动词，要用to连接，表示目的。