1.选A while 虽然,尽管
While Tom appears extremely cheerful in public,he is in fact leading a very unhappy life.
虽然汤姆在公共场合看起来很快乐,但是事实上他过着非常不开心的生活.
2.选 B
rarely 很少,否定含义的副词.要用anything
Besides the occasional hotdog,I rarely eat anything unhealthy.
除了偶尔会吃热狗以外,我很少会吃任何不健康的东西.as 也有尽管，虽然的意思呀 怎么不选它