【推荐1】All train times are________ change in bad weather conditions. （根据句意填空）

【推荐2】Today, the caves are just _______________ (和那个时候一样国际化) when people travelled the Silk Road. (根据汉语提示完成句子)

【推荐3】Standing in the distance, they _____________see misty clouds rising from the great Niagara Falls, which is on the south side of the lake.
她们站在远处眺望，看到湖的南边从尼亚加拉大瀑布上升腾而起的水雾，感到非常震撼。