Mr. Brown's condition looks very serious and it is doubtful if he will______.
【正确答案】 C
【答案解析】解析:题干:布朗先生的情况看起来很糟糕,不知他能否挺过去。pull back撤退,把……向后拉;pull up停下,阻止;pull through渡过难关,恢复健康;pull out退出,撤退。