单选题 When a heavy vehicle is______in the round, the driver has to ask for help.
A. involved B. stuck
C. interfered D. specialized

【正确答案】 B

【答案解析】[解析] 四个选项中A项involved adj. “有关的”；B项stuck adj.“卡住的，陷入”：C项interfered adj.“干涉的”；D项specialized adj.“专门的”。译文：重型汽车陷入泥坑里，司机不得不向他人求助。