请认真阅读下列各小题所给的两句句子，在空格处填上一个单词，使两句句子语义保持不变。请将答案写在答题卷上相应题号的横线上。（注意：不得使用第一句中的原词。）

71.　 Medicine should be placed out of children’s reach.

Medicine should not be placed where it is ___________ to children.

72.　 He is never late for appointments. What has happened to him today?

He is always 　　 ▲　　 for appointments. What has happened to him today?

73.　 Believe it or not, in our city library, I met with a man who looked like my brother.

Believe it or not, in our city library, I met with a man 　　 ▲　　 my brother.

74.　 The mum gave an angry lecture to the child because he would not sit still.

　 The child got __________ by his mother because he would not sit still.

75.　 She asked her old friends for advice when she was in trouble.

She 　　 ▲　　 advice from her old friends when she was in trouble.

Find out a mistake in the following sentence and correct if (找出句中的错误，并改正)：

To our surprise, he came without invited.

[　　]

A．To 　B．he　  C．came 　D．invited

Find out a mistake in the following sentence and correct it（找出句中的错误，并改正）

They were seen A enter B the great hall on C the morning of D December 10.

Find out a mistake in the following sentence and correct if (找出句中的错误，并改正)：

At the north of the factory is a small hill not more than two hundred metres high.

[　　]

A．At　 B．is  　C．not 　D．high

Find out a mistake in the following sentence and correct it（找出句中的错误，并改正）

The number of A stars in B the sky are C not known D.