— Why, David, you look so tired!

— Well, I ________an article and I must finish it tomorrow.

A. was writing                                                         B. will be writing

C. have been writing                                            D. have written

— Why, David, you look so tired!

— Well, I ________an article and I must finish it tomorrow.

— Why, David, you look so tired!

— Well, I ________an article and I must finish it tomorrow.

1. A.
   was writing
2. B.
   will be writing
3. C.
   have been writing
4. D.
   have written

— Why, David, you look so tired!

— Well, I ________an article and I must finish it tomorrow.

A. was writing                                                 B. will be writing

C. have been writing                                 D. have written

— Why, David, you look so tired!

— Well, I ________ an article and I must finish it tomorrow.

A. was writing　　　　　　 　 B. will be writing　 C. have been writing　　 D. have written