Life is like walking in the snow, Granny used to say, because every step ”
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：此处是奶奶过去常常说的一句话，这里是直接引语，句子的内容是生活哲理。所以用一般现在时。句意：奶奶过去常常说：“生活就像在雪中行走，因为每一步都看得见。”
【考点定位】考查动词时态。