英语翻译can you tell me how long dinosaurs -------- on the earth before they---------?A had existed ; disappeared B had existed; were disappeared C have existed ; disappeared D have existed ;were disappeared

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英语翻译can you tell me how long dinosaurs -------- on the earth before they---------?A had existed ; disappeared B had existed; were disappeared C have existed ; disappeared D have existed ;were disappeared
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英语翻译can you tell me how long dinosaurs -------- on the earth before they---------?A had existed ; disappeared B had existed; were disappeared C have existed ; disappeared D have existed ;were disappeared
英语翻译
can you tell me how long dinosaurs -------- on the earth before they---------?A had existed ; disappeared B had existed; were disappeared C have existed ; disappeared D have existed ;were disappeared

英语翻译can you tell me how long dinosaurs -------- on the earth before they---------?A had existed ; disappeared B had existed; were disappeared C have existed ; disappeared D have existed ;were disappeared
A 解析:恐龙是史前生物,因此它的存在属于过去完成式,因而需要用had +动词完成时态,即had existed
disappear无被动形态,所以,应该用主动形式disappeared,又因为恐龙灭绝在恐龙活在地球上这一事实之后,所以,前句用过去完成时,后一句用一般过去式,以达到时态对应.
整句话完整翻译:你能告诉我在恐龙灭绝前,它们在地球上存在了多长时间吗?

A 过去的过去用had existed 消失没有被动用disappeared。你能告诉我恐龙在地球上存在多长时间在他们消失之前?

正确答案:A
解释:“disappear”是过去的事情,因此过去的过去用had existed
“disappear”无被动,因此用disappeared。
翻译:你能告诉我恐龙在灭绝之前在地球上存在了多长时间吗?

A了