I heard a little boy____ English.A、reading B、read C、to read D、is reading

I heard a little boy____ English.A、reading B、read C、to read D、is reading
I heard a little boy____ English.A、reading B、read C、to read D、is reading

I heard a little boy____ English.A、reading B、read C、to read D、is reading
选A,表示boy 与 read English的主动关系~
一般这种感官动词 后跟的宾补有三种表现形式：不带to 的不定式、doing、done
所以排除C.D选项
至于 B 强调的是一种完成形态,所以选A

A