—I misspelt a word here in the sentence.

—Well, that's ________ you were mistaken.

A. when

B. what

C. where

D. why

—Well, that's ________ you were mistaken.

A. when

B. what

C. where

D. why

—The experiment is of particular importance.

　　　　—I see. We will carry on with it ________ we can get enough money.

　　A. unless　　　　B. though　　　　C. whether　　　　D. until

I began to fish before memory began, _______ I know I have always fished.

 A. so far  B. so as far as  C. as far as  D. so

I should like to try that coat on, but I don t know if it is my ____.

A. length   B. measure C.size  D. pattern