英语有个句子不懂To leave their jobs without any leadership did not c

英语问题---Why did you leave without a word of warning to John?- leave…without any doubt soon we would not have any trees_____.a.left b.leave c.to le they did not pay any attention为什么要加did.不懂did得用法? 有两处英语句子不懂,I hate to leave the others to 有个英语句子的结构不懂, 有个英语句子不懂,求解 英语句子改错 急Whoever turned in the last test did not put their na 翻译成英语：people did not begin to fear for their planet until th 英语选择Mr.Wilson said that he did not want to __________ any fu If this I did not succeed,I choose to leave 英语时态：过去时1.he did not leave here yesterday.2.did he leave her