There_____(be) no rain since last mouth

There_____(be) no rain since last mouth
There_____(be) no rain since last mouth

There_____(be) no rain since last mouth
has been

has been

since 和完成时连用

【希望帮助到你，若有疑问，可以追问~~~
祝你学习进步，更上一层楼！(*^__^*)】

has been
since前用完成式