1.when you are faced with difficulties,who will you first think of?
2.因为first是副词,所以两种位置都可以.
3.I usually dream of that girl.
4.Recently I usually have different/ the same dreams.
5.不能说think sb,think of 比较好,about 的话是考虑而不是想到.
6.当然还是think about 比较好.其实也可以用come up with sth