Question

一个英语选择题，请给出原因

John spent too much time talking on ____ phone while we were all busy at ____ work.
A. the; / B. a; / C. /; / D. the; the

Answer 1

答案选择A。phone是可数名词，其前需有冠词修饰，work是不可数名词，其前不可有冠词。另外，at work是习惯用法。

Answer 2

A on the phone 和at work 都是习惯用法,多看就懂.

Answer 3

on the phone 、at work 都是习惯用法。。