英语问题--谢谢

这个句子主语是many of his articles ，而A选项是现在分词，主语必须是人称代词。C选项是表将来时态或者是目的，所以不选。D选项，举个例子：Having finished my homework，I went to sleep.完成作业这个动作发生在睡觉之前就可以用这个时态，这是高一的语法知识。
所以选B，完整一点应该是Many of his articles
were written carelessly,they are hard to read.

主语是his articles，而不是他。

注意分析句子。

文章是被写，用被动。

这是非谓语动词的用法，句子的逻辑主语是articles,跟write是被动关系，所以选B

many of his articles are hard to read.
他的论文的许多地方是很难读懂的，所以只有B能表达这个意思
written carelessly（论文）被写的很粗心
补全了就是
His articles are written carelessly
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