根据下列各句句意和空白之后的汉语提示词，在答题卡指定区域的横线上写出对应单词的正确形式，每空只写一词。
He tried to kill himself by taking a deadly       （毒药）.
I believe that each of us can_______（贡献)to the future of the world
It is _______(方便的) to pay by credit card.
Can you tell me     of (提前) time if you are coming?
They want to ______ (申请)for the cellphone for their school going kids
Success _________(由…决定) on your effort and ability.
They had no time to _________(安排) their own wedding
We should be________(乐观的) about our future.
Mum ________(责备) herself for Li Ping’s problem.
Camels live in the ________(沙漠).