19．At that time people would starveif it was hard to find food（如果食物很難找到），especially during the cold winter months．

分析 那個時候如果食物很難找到人們就會挨餓，尤其是在寒冷的冬月．

解答 答案：if it was hard to find food
解析：根據(jù)前面的would（will的過去式）可知后面的條件狀語從句該使用一般過去時；從句可以使用it作形式主語，動詞不定式作真正主語．綜上，本題答案為：if it was hard to find food．

點評 本題考查語言交際，做此類題目時一定要清楚各個選項的含義及用法；再結合句意及其它要求確定最終答案．

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