单词拼写(满分10分)
The famous explorer, who has many exciting and dangerous experiences, is now giving a speech about his a________ in Africa.         
It is suggested that short-sighted students have their eyes e________ regularly.
It is not a________ for you to attend the ceremony in casual (随便的) clothes.
After the fun he’s had during the holidays, the boy can’t________ (专心，集中)on his school work.
Now that you are a college student, you should learn to be_______ (独立的) of your parents’ help.
I have been offered a large sum of money to go away, but I am________ to stay here.
The manager was________, but he could do nothing.
He answered me, but he spoke slowly nor clearly. ‘I am a________,’ I said.
I think that young children often________ modern pictures better than anyone else.
Many students find mathematics________（复杂的） and difficult，which worries their parents very much.