I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

1. A.
   is
2. B.
   was
3. C.
   are
4. D.
   were

I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

A. is               B. was                      C. are             D. were

I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

A. is               B. was                      C. are             D. were

I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

 I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

A. is               B. was              C. are              D. were