Mr. Brown’s condition looks very serious and it is doubtful if he will .A. pull backB. pu

问题补充：

Mr. Brown’s condition looks very serious and it is doubtful if he will .

A. pull back

B. pull up

C. pull through

D. pull out

答案：

A. pull back

B. pull up

(答案→)C. pull through

D. pull out

解析：考查动词短语：句意：布朗先生情况危急，不知道他能否度过危险。pull through vt. 渡过（脱离，使...脱险）；pull back撤出阵地，pull up停下，pull out拔出，退出，（使）离开，（火车）驶出，选C。