It's very difficult ( ) get to the top of Mount Qomolangma.怎么填?

to

填 to
It is difficult to do sth
have difficulty (in) doing sth

答案：to
解析：本题中，it is (very) difficult to do sth表示做某事很困难。
推广：it is + 形容词 + for sb.to do 为一个句型。
句型特例：当这个形容词是用来形容人的特点时：it is +形容词+ of sb.to do .

to
it is +形容词+to do sth句型
祝你进步

It's very difficult to get to the top of Mount Qomolangma.
括号里面是 get to吧.意思是 很难到达珠穆朗玛峰的最高点呢.
欢迎采纳哦亲!