The nurse allowed the visitors to remain the visiting hours though it was not permitted.A.

问题补充：

The nurse allowed the visitors to remain the visiting hours，though it was not permitted.

A. within

B. at

C. beyond

D. before

答案：

A. within

B. at

(答案→)C. beyond

D. before

解析：句意：过了探视时间护士仍然允许探视者留在病房，尽管按规定这么做是不允许的。这里用beyond“超过，超出…的范围”，at“在…地方”，within“在…范围之内”，before“在…前面”，所以选C。