应为these years吧，它意为这些年或近年来.所以通常是与现在有关的时态，如：these years,more and more people prefer shopping online rather than in mall（
一般现在时）.近年来，越来越多的人们相比逛街更喜欢网购。也可换为these years,the online-shopping is expanding rapidly（
现在进行时）.也可以：these years,the online-shopping has been developed more rapidly than ever.(
现在完成时)；如果是those years则接与过去相关的时态。