第29题: [单项选择]______ he realized it was too late to return home. A. No sooner it grew dark when B. It was not until dark that C. Scarcely it grew dark than D. While it grew dark that 参考答案:B 答案解析:It was not until…that是一种强调句形式，意思是“直到天黑之前还没有意识到……”，通顺的译法是“直到天黑下来才意识到……”。
