1.(2019·浙江高考，65)School uniforms are ________ (tradition) in Britain, but some schools are starting to get rid of them.
答案：traditional 此处形容词作表语，用来说明主语school uniforms的特点。
2．(2019·浙江高考，60)When the children are walking or cycling to school on dark mornings, car drivers can ________ (easy) see them.
答案：easily 此处修饰动词see，用easy的副词形式easily。
3．(2019·全国卷Ⅰ，68)Scientists have responded by noting that hungry bears may be congregating (聚集) around human settlements, leading to the illusion (错觉) that populations are ________ (high) than they actually are.
答案：higher 根据空格后的than可知，此处应用high的比较级形式higher。
4．(2019·全国卷Ⅲ，61)On our way to the house, it was raining ________ hard that we couldn't help wondering how long it would take to get there.
答案：so 分析句子结构可知，此处是so ... that ... 结构，意为“如此……以至于……”，so修饰副词hard。
