用动词不定式改写下列句子

用动词不定式改写下列句子
1.the accident was so terrible that we can`t talk about it
2.was cortes the first european who ever saw the pacific ocean?
3.here is something that you can do while you`re waiting
4.i haven`t decided whether i shall answer his letter or not
5.she stood up so that she could be seen better
6.my brother got up early in order that he would have enough time to pack
7.i`ll buy you some magazines which you may read on the journey
8.we thought is wrong that he should be punished
9.i didn`t know whether he had changed his ming about what he would say
10.we consider that the girl is trustworthy