Police are looking into the disappearance of two children these days.A.are looking intoB.have been looking into问：为什么选A,后面时间“these days"不是一段时间吗?表一段时间该用完成时啊
问题描述：
Police are looking into the disappearance of two children these days.
A.are looking into
B.have been looking into
问：为什么选A,后面时间“these days"不是一段时间吗?表一段时间该用完成时啊
答
你觉得these days these days 是一个很常用的词组,意思相当于“目前”“现在”,那你说选A还是B?