题目

The basketball is _____ the bed _____ the floor.       A. under, on  B. under, in            C. on, under    D. on, on 答案：A Only ________ as an interpreter ________ how important it was to practise speaking English． [　　] A．when did I work; I realized B．when did I work; did I realize C．when I work; did I realize D．when I worked; did I realize