Ⅰ. 单词拼写
1．I stood in the kitchen, waiting for the water to ______(沸腾)．
2．I’ll put the ________(水壶) on and make us some tea.
3．We expect to see further ________(改善) over the coming year.
4．The nature and ________(有效性) of material evidence was not to be discussed.
5．In an electric power plant the heat converts water into high-pressure ________(蒸汽)．
【答案】1．boil 2．kettle 3．improvement 4．availability 5．steam
