The doctor told Jack’s mother that it would not take him long to ________ from his illness.
A. suffer B. separate
C. escape D. recover
知识点：动词/动词短语
D
考查动词词义辨析。句意为医生告诉jack的妈妈不用多久他就会痊愈的。 Recover from从...中康复，符合句意。Suffer from遭受，忍受； separate from与...分离；escape from从...中逃离。故选D。