问题

Every possible means , but none successful

A:has tried; has proved
B:tried; proves
C:has been tried; proves
D:is being tried; is proved

正确答案是：

同类题型

still half drunk, he made his wayhome.

22MR Jackson, _______ car I borrowed for his journey, is a famous writer

Some people like wearing fashionable clothes; ______, some birds like bright feathers

’t you seen the speed limit signPlease drive .—Sorry,but I have to.

If you have a toothache, you should go tosee a______.