By the time he ______ ten, he ______ about 3,000 English words.
By the time he ______ ten, he ______ about 3,000 English words.
A. had been, had learned B. was, had been C. was, learnedD. had been, learned
A. had been, had learned B. was, had been C. was, learnedD. had been, learned
英語人氣：405 ℃時(shí)間：2020-05-30 07:29:15
優(yōu)質(zhì)解答
【答案】B. was, had been【解析】by the time1)到…時(shí)候?yàn)橹?通常引導(dǎo)一個(gè)時(shí)間狀語從句,表示“到……的時(shí)候?yàn)橹埂敝骶鋭t表示在此時(shí)間之前某個(gè)事件已完成.值得注意的是,當(dāng)從句用【過去時(shí)】時(shí),主句通常用【過去...
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