The teacher's six-month practical training at a local middle school proved \_\_\_\_ to his professional knowledge and teaching skills.
Avalue
Bvalued
Cvaluing
Dinvaluable正確答案
答案與詳解
為什麼答案是 D
invaluable 為形容詞，意為「無價的、極其寶貴的」，符合 prove 後接形容詞的句型，且完美契合實務訓練帶來極大幫助的語意。
載入中…
