The ancient manuscript \_\_\_\_ by scholars and was later discovered by researchers who were amazed by its historical significance.
Ahas carefully preserved
Bcarefully preserved
Cwas carefully preserved正確答案
Dwas carefully preserving
答案與詳解
為什麼答案是 C
"was carefully preserved" 為過去式被動語態，符合手稿被保存的語意，且與後方 "was later discovered" 時態與語態一致。
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