a difficult situation, so you should send a message to him and give some advice to him .
A. As he is in
B. He is in
C. Being in
D. He being in
网友回答
A. As he is in
B. He is in
C. Being in
D. He being in
解析： 题意：他陷入困难的境况，你应该给他发条信息并且给他提些建议。so(因此)是并列连词，引出一个表示结果的分句，前面应是一个表示原因的分句，而无需再用连词，排除A；C和D又不是句子，也错了。