When all those present were seated he began his lecture 翻译

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• When all those present were seated he began his lecture 翻译
• 谁能帮我做一下下面的这些英文题呢?1.Look!The flag is （ ） now.A.being raised B.being rose C.risen D.raising2.The girl even won’t have her lunch before she （ ） her homework.A.will finish B.is finishing C.was finishing D.finishes3.They （ ） the trip until the rain stopped.A.continued B.didn’t continue C.don’t continue D.would continue4.When all those present （ ） he began his lecture.A.sit B.set C.were seated D.seated5.In the past five years,Robert （ ） England twice.A.visi
• When all those present were seated he began his lecture 翻译
• When all those present(到场者)__ he began his lecture.(重点题) A.sit B.set C.seated D.were seaed选哪个 why?
• When all those present___he began his lecture.A.sit B.set C.seated D.were seaed为什么 AB改为sat就可以 不是不及物动词吗?
• When all those present ___he began his lecture A,sit B set C seated Dwere seated
• When all those present(到场者)__ he began his lecture.A.sit B.set C.seated D.were seaed
• 英语时态：When all those present were seated he began his lecture.When all those present were seated he began his lecture.观众入场以后他才开始演讲,那观众入场就是过去的过去,应该用过去完成时的被动语态猜对呀,为什么这里用的是一般过去时的被动语态?
• When all those present ___he begin his lecture.A.sit B.were seatd 我还是有点不明白为什么选A,不是说sit是不及物动词,后面就不能加宾语了吗老师说把空格后面括起来,不管.为什么呢?这个句子的宾语是哪个?为什么空格后面的句子可以括起来无视掉呢?
• When all those present___he began his lecture.(D) A.sit B.set C.seated D.were seated为什么选择D 没懂
• We had a very hard time _____some of the problems.A discussing B to discuss C of dicussing D discuss选什么 为什么?
• 1.it's time we got down to discussing the problem为什么用discussing不用discuss 谢谢~~2,in an hour,we can travel to places___would have taken our ancestors days to reach为什么要用which 顺求整句翻译3.sound waves in the air in much the same way___water waves spread on the water.为啥用as 不用that where in which之类的.顺求翻译.谢谢~