問題詳情：
用括號內所給單詞的適當形式填空。
teacher gave us a lot of__________(help)books on math.
__________(leaf)on the trees turn yellow in fall.
sick man came to Beijing for better __________ (medicine)treatment.
________(pronounce)has improved,but he still does much practice every day.
policemen that lost their lives in the earthquake are___________(hero)in my heart.
【回答】
ful es cal unciation es
知識點：構詞法
題型：完成句子
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