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(舊)TOEIC(Test of English for International Communication)題庫下載題庫

上一題
135. It has recently been proved_________ lasers can be used to perform bloodless, painless surgery.
(A) where
(B) until
(C) while
(D)that

答案：D
難度： 簡單


135. It has recently been proved________..-阿摩線上測驗