a 學生落座后,演講者開始講話.
b和d的邏輯主語是speaker,所以不對
c 是完整的句子,沒有and 連接,也不對
_____________, the speaker began his speech. 選哪個
_____________, the speaker began his speech. 選哪個
a.the students having taken their seats.
b. having taken their seats.
c.the students have taken their seats.
d.taking their seats.
a.the students having taken their seats.
b. having taken their seats.
c.the students have taken their seats.
d.taking their seats.
英語人氣：201 ℃時間：2019-12-19 02:21:57
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