Generally, the time a fire drill takes to evacuate is measured to that it occurs within a reasonable length of time.
Aensure正確答案
Breward
Cinterpret
Dswear
答案與詳解
為什麼答案是 A
ensure = 確保。全句：測量消防演習疏散時間，以確保在合理時間內完成。語意與結構皆正確。
考點：ensure 確保考點：獎勵不合文意考點：解釋不合文意考點：發誓不合文意
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