If we have illegal immigrants in many local workers will lose their jobs．A. cameB. coming

问题补充：

If we have illegal immigrants in，many local workers will lose their jobs．

A. came

B. coming

C. to come

D. having come

答案：

A. came

B. coming

C. to come

D. having come

解析：此处have sb．doing sth．强调动作正在进行。