题目内容

【题目】用所给词的适当形式填空。

1.His father bought a nice bike for his _________(twelve) birthday.

2.There are about two________ () students and teachers in our school.

3.Take three pills _________(two) a day after meals for a week.

4.My uncle bought a new flat. It is on the________(九)floor.

【答案】1. twelfth 2. thousand 3. twice 4. ninth

【解析】

1. birthday为单数名词,前面用序数词,512的序数词变vefth,故答案为twelfth.

2.前有基数词two,千不加s,故答案为thousand.

3.考察频率副词,两次,故答案为twice.

4. floor为单数名词,前面用序数词,故答案为ninth.

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