Question

根据句意用括号中所给单词的适当形式填空。

1.Two_______________(five) in our class are boys.

2.I don’t think this is her most ____________________(success) speech.

3.Edison is one of the greatest ____________________(invent) in the world.

4.Listen! There must be someone __________________(knock) at the door.

5.Many kinds of animals have____________________(appear) from the earth.

Answer

1.fifths

2.successful

3.inventors

4.knocking

5.disappeared

【解析】

试题分析：

1.根据句意：我们班五分之二是男生。英语分数的表达法：分子是基数词，分母是序数词；当分子大于一时，分母加s。five的序数词是fifth。所以填写fifths。

2.根据句意：我认为这不是她最成功的演讲。结合所给单词和句意，可知该填写形容词successful，成功的。

3.根据句意：爱迪生是世界上最伟大的发明家之一。invent动词，发明；inventor名词，发明家；可知该填名词复数inventors。

4.根据句意：听！一定有人在敲门。There be sb.+ doing sth.有某人在做某事。knock动词，敲 。所以该填knocking

5.

考点：词语运用。