They show the blind person where he can walk safely.(保持原句意思不变) They show the blind personThey show the blind person ____ ____ ____safely.
问题描述：
They show the blind person where he can walk safely.(保持原句意思不变) They show the blind person
They show the blind person ____ ____ ____safely.
答
where to walk
where he can walk = where to walk