语法与词汇 16.The patient's health failed to such an extent that he was put into______ care.
【正确答案】 C
【答案解析】C项intensive意为“精心的”,修饰care(照料),符合题意。A项tense意为“绷紧的,紧张的”;B项rigid意为“刚硬的,刻板的,严厉的”;D项tight意为“紧的,拉紧的,密封的,挤满的”。