请认真阅读下面各小题，并根据提示写出正确的单词。

小题1:I have to believe that encouragement is so _____________ (强有力的) that it can change a person.

小题2: I’m g___________(感激的) to my teachers’ help.

小题3:I’ve known Lucy for years. __________(实际上)，we have been good friends since our childhood.

小题4:The people ___________(受伤) in the accident were sent to hospital without delay.

小题5: Every year, many natural ___________(灾难) happen all over the world.

小题6:Lucy! I’m sorry I didn’t r___________ you. You’ve had your hair cut.

小题7:Father is thankful to me for p____________ him to give up smoking.

小题8:Some people hold a wrong a___________ towards the disabled.

小题9:She refused to give the taxi f________ because of the delay.

小题10:He b________ into tears at the news that both of his parents died in the Yushu earthquake.

In relation to employment law, explain the extent to which an employer may make signifi cant changes to the conditions of a labour agreement. (10 marks)