Question

The teacher told us yesterday that December 25______Christmas Day.

1. A.
   is
2. B.
   was
3. C.
   has been
4. D.
   will be

Answer 1

A
虽然主句The teacher told us yesterday用的是一般过去式，但宾从that December  25______Christmas Day说的是客观事实，所以用一般现在时。选A。