He has much difficulty in learning English；______, he isn’t discouraged.

       A. so                     B. and                          C. or                            D. however

through   A. though              B. cough               C. enough              D. laugh

 character     A. chain                B. church               C. stomach            D. machine

 hour        A. honour              B. court                 C. tour                  D. ourselves

effect             A. recent        B. forest           C. fresh          D. cruel

knock            A. prove          B. above          C. longer        D. lonely

I wonder why you won’t do it as ________ and it’s the third time you _______ so.

   A. I told you; do     B. be told; have done C. told to; have done   D. told; do

I was so familiar with him that I recognized his voice ____ I picked up the phone.
   A. while                 B. after                 C. in case                        D. the minute

I have the same opinion as you _____ the privacy of one’s life should be kept secret.

A. that               B. which             C. whether            D. where

― Why! Where is the key to the meeting room? Can I have left it in the taxi?

― Dear me! You       anything in the taxi!

A. had never left      B. have never left   C. would never leave  D. never leave