He may get his teaching qualifications but I couldn't imagine （

He may get his teaching qualifications but I couldn't imagine （ ）long term in the current school environment.
A、him work
B、him working
C、he working
D、him to work
【正确答案】：B
【题目解析】：文字解析 他可能会取得教师资格证，但我无法想象他长期工作在当下的校园环境中。 Imagine后+ing分词形式，分词的逻辑主语可以为属格或宾格。