Question

The two American customers speak English so ______________that the waiter can hardly understand what they said.

A.mainly B.properly C.quickly

Answer

C

【解析】

句意：这两个美国顾客说英语如此快以至于服务员几乎不能理解他们说的话。

考查副词词义辨析。mainly主要地；properly合适地；quickly迅速地。根据“the waiter can hardly understand what they said.”可推断出，此处表示这两个美国顾客说话太快了以至于不能理解。故选C。

错因①考生不清楚三个选项的含义；②未根据“the waiter can hardly understand what they said.”推断出此处表示这两个美国顾客说话太快了，以至于服务员几乎不能理解他们说的话。