1.23.

A. 　 what

B. 　 which

C. 　 why

D. 　 when

A. 　 and

B. 　 but

C. 　 so

D. 　 with

A. 　 either

B. 　 or

C. 　 for

D. 　 and

A. 　 Not at all

B. 　 No, thanks. I’m full

C. 　 You are welcome

D. 　 OK, here you are

A. 　 then

B. 　 when

C. 　 suddenly

D. 　 and

A. 　不填;the

B. 　 an;the

C. 　不填;不填

D. 　 the;不填

A. 　 in addition to

B. 　 in place of

C. 　 in honor of

D. 　 in exchange for