I.单词语境记忆——根据汉语提示写出单词的适当形式1.The book is _ reserved_(保留) to whoever comes first.2.The farmer gained a lot of experience by observing _(观察) the growth of his vegetables. 3.If sales continue to recover, they can hire more workers and still makeprofits(利润). 4.The man was walking in the wood when he was attacked_ (攻击) by a snake.