4. At last he sold his ______. ( invent )

Key: 1. development 2. workers 3. kindness 4. invention

分析：宾语是动作的承受者，分动词宾语与介词宾语两种。宾语的词性同主语的词性一样，代词作宾语时必须用其宾格。

(4) 对表语的判断

3. Thank you for your _______. ( kind )

2. The front is in great need of medical _____ .( work )

1. Mr. Chen was surprised to see the fast ________ in 　Shanghai　 after his long absence from the city. ( develop )

5. ________ stamps is my hobby. ( collect )

Key: 1. Teachers 2. Health 3. scientists 4. Fishing 5. Collecting

分析：以上练习中，填入词均为句子的主语。主语是动作的发出者，词性主要为名词与代词(1-3题)；动词不能直接用作主语，必须转化成其对应的名词或doing(4、5)。此外，形容词前加the，带连词的句子也可作主语。

(2) 对谓语的判断

John was standing on the step of a house. An old woman c________ over to him. “My boy,” she a_____, “Is your father at home?” “Yes,” a_______ John. The woman began r_________ the bell. She rang and rang, but there was no answer. At last she t_____ back to John and s______ angrily, “Didn’t you s______ that your father was at home?” “I did”, answered John, “but this i_______ my house.”

Key: came asked answered ringing turned said say isn’t

分析：语篇中的所缺字除ringing以外均为谓语动词。谓语是句子所表示的动作，词性只能是动词，在句子中不能缺。当一个主谓结构中同时出现两个或以上动词时，还要判断他们之间的相互关系，对谓语动词或非谓语动词的判断只有在熟练掌握相关知识的基础上，才能作出正确的判断。多做用动词的适当形式填空有助于对动词形式的判断。

(3) 对宾语的判断

4. _______ is my favourite sport. ( fish )

3. Some famous _______ are going to give lectures in our university in August. ( science)

2. _____ is more important to me than money. ( healthy )

1. _______ are helpful to students. ( teach )