题目

The policeman told me that I had passed the driving test and never in my life _______ so happy and excited． A．I felt           B．did I feel          C．I had felt         D．had I felt 答案：D20．一个数由6个百亿、5个十万、6个千和3个一组成，这个数写作600 0050 6003；读作六百亿零五十万六千零三；省略“万”后面的尾数大约是600 0051万．