parents usually talk to their children's( )the phone a.about b.in c.at d.on
问题描述：
parents usually talk to their children's( )the phone a.about b.in c.at d.on
答
d.on
on the phone 用电话交谈和这个一样的词组你给我几个好吧on the air广播on the contrary正相反on the one hand一方面on the other hand另一方面on one's way在…途中