填空题 Now many young people spend several hours a day(talk) 1on a mobile phone。
【正确答案】
【答案解析】(in)talking [考点] 动词用法
[解析] 句子的谓语动词是spend,其用法为sb.spend some time(in) doing sth.,其中介词in可以省略。由此可以确定,空格处需要使用talk对应的动名词形式(in)talking。