第15题: [单项选择]Not until the day before yesterday ______ to give a speech at the meeting. A. he agreed B. does he agree C. he agrees D. did he agree 参考答案:D 答案解析:[详解] 本题考查的是not until置于句首的情况。not until意为“直到……才……”,当它置于句首的时候,后面的句子要倒装,由此可排除选项A)和C),而根据此句中的the day befo