問題詳情

Many cities have green reputations. But in the developing world, where middle classes are growing alongwith consumption, waste and energy use, Mexico City has become a leader. (21) _____ in the 1980s,Mexico’s government created mandates that closed or moved toxic factories and banned most drivers (22)_____ their cars one day a week. Mexico City has added a free bicycle loan program and (23) _____ publictransportation. But the most spectacular green project so far has to be the three eco-sculptures installed (24)_____ the city. The vertical garden not only catches the eye, (25) _____ it gobbles up the carbon dioxidecontributing to high ozone levels.
21.
(A)To start
(B) Starting
(C) Started
(D) Start

參考答案

答案：B
難度：簡單0.714286
統計：A(2),B(25),C(6),D(1),E(0)

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