while writing he locked himself in his study.A. Not to interruptB. Not being interrupted

问题补充：

while writing, he locked himself in his study.

A. Not to interrupt

B. Not being interrupted

C. Not to be interrupted

D. Being not interrupted

答案：

A. Not to interrupt

B. Not being interrupted

(答案→)C. Not to be interrupted

D. Being not interrupted

解析：考察不定式做目的状语。不定式的否定式是在前面直接加not；结合句意可知C正确。句意：为了在写作时不被打扰，他把自己锁在了书房里。