单项选择题
The European Union countries were once worried that they would not have ______ supplies of petroleum.
单项选择题 John wants to ______ of his old bike and buy a new one.
单项选择题 Pick me up at 8 o'clock. I ______ my bath by then.
单项选择题 All ______ is a continuous supply of the basic necessities of life.
