【題目】

（2013 浙江嘉興模擬） David couldn't tell __________ from far away whether the green traffic light meant going straight or turning left.

A. on purpose

B. at random

C. in short

D. for sure

【答案】D

【解析】句意：戴維不能確切地從遠(yuǎn)處辨別綠色交通信號(hào)燈意味著是要直行還是左轉(zhuǎn)。on purpose故意，有意地；at random隨意，隨機(jī)；in short簡(jiǎn)言之，總之；for sure確切地，肯定。

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