高二英语题目！！！急！
1.They ran into the supermarket,_____a hiding place from the heavy rain.
A.just to find B.only to find
2.It was_______that he couldn't finish it by himself.
A.so difficult work B.such difficult work
3.bother to do 和 bother doing的区别
请做出选择并作一下简要解释
谢谢！
参考答案:1.They ran into the supermarket,__B___a hiding place from the heavy rain.
A.just to find B.only to find
2.It was____B___that he couldn't finish it by himself.
A.so difficult work B.such difficult work
3.bother to do 和 bother doing的区别
bother doing 表示作某事感到疑惑或为某事而操心
bother to do 表示想到做某事
（这些答案是正确的）