19．The forest ______a week ago and the natural fire ______in the heavy rain at last．（　　）
A．on fire； put outB．on fire； went out
C．caught fire； went outD．caught fire； put out

分析 這片森林一周前著火了，并且這場自然火災(zāi)終于在大雨中熄滅．

解答 答案是C．本題考查動詞短語辨析．catch fire著火（動作）；on fire著火（狀態(tài)）；put out撲滅，（動作，及物）；go out 熄滅（狀態(tài)，不及物）．題干中第一空缺少的是表示動作的謂語動詞，所以排除A和B；第二空后面沒有賓語，所以用不及物的短語go out；由此判斷答案選擇C．

點評 關(guān)于短語動詞的解題，首先要積累識記盡可能多的短語動詞及其含義，然后結(jié)合語境進行合理的推斷．

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