問題詳情:
Mobile phones are not so expensive as they ___________ to be.
A. are used B. were used C. use D. used
【回答】
D
知識點:動詞時態
題型:選擇題
問題詳情:
Mobile phones are not so expensive as they ___________ to be.
A. are used B. were used C. use D. used
【回答】
D
知識點:動詞時態
題型:選擇題