English Senior High about 5 yearsago

これの答えは(ア)です。 イ、ウ、エ　が間違えだという解説をわかりやすくお願いします。

(2) この部屋には, 向こうの部屋の約2倍の人がいる。 There are about ( ) in that room. ア twice as many people in this roomas イ as twice many people in this room as ウ twice more people in this room than エ twice as people as in this room