It was impossible that he forgot to wear the helmet. A. He should have worn the helmet B. He must have worn the helmet C. He might have forgot to wear the helmet D. He needn’t have forgot76/147It was impossible that he forgot to wear the helmet.He should have worn the helmetHe must have worn the helmetHe might have forgot to wear the helmetHe needn’t have forgot wearing the helmetGiải thíchChọn C