There are some in your writing. You’d better correct them now. A languages B lettersC num

问题补充：

There are some in your writing. You’d better correct them now.

A languages B lettersC numbers D mistakes

答案：

解析：A.语言 B.书信 C.数字D.错误。结合下文意思，你最好现在改正他们，可知前文意思为：你的书写有一些错误。故选D。