I will never forget Mary,I saw her only once（）

I'll never forget ______ (see)the musical comedy in New York．

I can never forget the day _____ we spent together.

A. when

B. in which

C. at which

D. which

A.which/that/省略

B.when

C.where

D.on which

A.seen

B.see

C.to see

D.seeing

A.what

B.which

C.where

D.why

I can never forget the day ____ I got the first prize in the competition.

A.that

B.where

C.which

D.when

I'll never forget _____ of 1983 when I entered the college.

A、 a summer

B、summer

C、the summer

D、summers

The day __________ I shall never forget is the one __________I joined the army.

A.that...where

B.when...in which

C.which...when

D.on which...why

A.which

B.that

C.what

D.when