The little boy was so careless with his spelling that she often letters from words.A. left

问题补充：

The little boy was so careless with his spelling that she often letters from words.

A. left out

B. left behind

C. left off

D. let alone

答案：

(答案→)A. left out

B. left behind

C. left off

D. let alone

解析：考查短语辨析。left out 漏掉，left behind 落在后面，left off 使终止，let alone更不必说，句意：对于他的拼写这个小男孩如此的粗心以至于他经常单词的字母。所以选A。