他没有听见敲门,因为他正在听收音机。He didn’t hear the knock at the door ________ he______ ______ _______ the radio.
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直到我叫他的名字,他才看见我。He _____ _____ me _____ I called his name.
既然你需要这本书,你就拿走吧。_____ _____ _____ the book, you may take it.
这就是那个帮助过我的人。This is the man _______ _______ me.
你认识那个名叫李萍的女士吗?Do you know the lady _______ name _______ Li Ping?