hear后邊不加to do排除掉bd
應(yīng)該選擇a
hear后應(yīng)加do doing done
符合這個的只有 a ,c是過去式不是過去分詞
Mary was heard ____ two songs at the party.
Mary was heard ____ two songs at the party.
A sing
B to sing
C sang
D to have sung
應(yīng)該選什么啊
A sing
B to sing
C sang
D to have sung
應(yīng)該選什么啊
英語人氣：529 ℃時間：2020-02-03 04:13:12
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