题目

I have been learning _______ a car, and I’ve earned a lot about driving.   A. how to driving  B. how driving    C. how to drive   D. to drive   答案：C一个人沿路走近某一盏路灯，在走路过程中，路灯照射人，人的影子长短在变化，其变化情况是（ ）A．逐渐变短B．逐渐变长C．先变短再变长D．先变长后变短