再次欢迎英语天才您的光临!come in~
问题描述：
再次欢迎英语天才您的光临!come in~
以下两题应该分别选哪一个呢?
1 If we fail ___ now,they will get out of control.
A these problems
B to deal with these problems
C to have dealt with these problems
D to dealing with these problems
2 Don't use words ,expressions,or phrases___only to people with knowledge of zoology.
A being known
B having been known
C to be known
D known
答
1,B 因为fail in sth 或是fail to do
2,D 因为没有必要这里使用being done的结构