One and a half apples_____ left on the table.(A.is B.are)

问题描述:

One and a half apples_____ left on the table.(A.is B.are)
我周围同学选什么都有.
望给出权威的答案
但是答案的确是A
做过的同学也选A
我一开始也选B,但是不懂答案

are