5.It is difficult to obtain ） evidence.

5.It is difficult to obtain ） evidence. （单词的例句,没有语境）Oil is scarce but wars to obtain it are not. It is difficult to find （语法问题）learning english is difficult 与it is difficult to lear because it is difficult （）me 填to还是for 1.It is difficult to breathe at （altitudes）,which It is even（ ）to learn English well.(difficult). is it difficult to learn Japanese? It is difficult to start a (). it is difficult to find a (工作) how difficult is it to save money? It is very difficult to love someone .