--- How many of you have solved the math problem?--- ________, the math problem is far too difficult for us to work out. .
She jumps _____of us four.
Lingling comes ______than any other student in her class every day.
_______is really difficult for them_______the mountain.
I like skiing better than climbing because I think climbing is ________ skiing.
It took me two weeks________reading the novels written by Guo Jingming.