题目

上午九点时分针与时针互相垂直，再经过    分钟后分针与时针第一次成一条直线． 答案：   解析：分针每分钟转动6°，时针每分钟转动0.5°，设再经过分钟后分针与时针第一次成一条直线，则有，解得. Fill in the blank with“that, who(m), whose, which”． 1)He saw a house ________ windows were all broken． 2)All the apples ________ fall are eaten by wild boars． 3)Can you think of anyone ________ could look after him?