34. That( A ) copper and bronze were first used( B ) in the world is ( C ) an interesting question in science history( D ).

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統計: A(105), B(13), C(50), D(63), E(0) #613883

詳解 (共 4 筆)

#1098589
改為When  
語意:銅和青銅何時在世界上首次被使用,是科學史上一個有趣的問題。
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#4096119
改成: That when coppe...
(共 129 字,隱藏中)
前往觀看
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#910124

這要怎麼改呢


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#1412830
That通常用於代稱或指一物
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