[考題] 請高手講解這題文法

[partybear79 (delay)]

If the concentration of greenhouse gases in the atmosphere (___) increase,

then more heat likely would be retained, and global temperatures

would rise.


A. are to

B. shall

C. were to

D. will

謝謝

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推 eager:答案是C吧?
→ partybear79:不好意思小弟我也沒答案耶 >"<
推 skyi:答案C，對未來事情的假設，if+S+were to+V, S+would+V
→ partybear79:好清楚 謝謝樓上
推 ilyvonne:文法好難啊! 要是我就直接 If....atmosphere increase 囧
推 b9606022:were to , would 不是對事實相反的假設嗎