“Life is like walking in the snow，”Granny used to say，“because every step .”(2012·新课标全国)
A. has shown
B. is showing
C. shows
D. showed
网友回答
A. has shown
B. is showing
(答案→)C. shows
D. showed
解析：考查时态。句意：“人生就像在雪中走路，”奶奶过去经常说，“因为每一步都留有足迹。”本句叙述的是客观事实，所以用一般现在时。此处show用作不及物动词，意为“露出，显出”。