【Pep Si Kuo】評論
Sam didn’t __join__ the karaoke contest, but I _joined__.山母沒有參加卡拉ok比賽但是我有參加。說明:but 為連接詞連接兩個完整句子。助動詞後面接原型,故選A(A) join; did(B) join; joined(C) joined; joined(D) joined; did .