19．The order from the commander was that the troops should setout/off for the front immediately．

分析 指揮官的命令是部隊(duì)?wèi)?yīng)該立即開往前線．

解答 答案是out/off．
本題考查語境中選用恰當(dāng)?shù)脑~的適當(dāng)形式．set out/off for"出發(fā)去某地"，根據(jù)語境，部隊(duì)"開往前線"，故答案是out/off．

點(diǎn)評 單詞填空必須在對語境整體理解的基礎(chǔ)上抓住指向答案的關(guān)鍵線索、固定句型或搭配等，同時(shí)注意所選詞的形式變化．

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