【推荐1】数以千计的观众站立观看比赛的日子一去不复返了。现在在我们这里，甚至每个足球迷都很容易拥有一个座位。
The days were gone when thousands of audiences stood to watch the match. Now even each soccer fan __________________ have a seat here.

【推荐1】高而薄的云层有助于升温，而低而厚的云层使地球冷却。
High thin clouds _______________ heating while low thick clouds cool Earth.