There are many old trees in our school, each ________ about 100 years ago.

A. dates back to     B. dating from

C. dated back        D. which dated to

There are many old trees in our school, each ________ about 100 years ago.

A. dates back to     B. dating from   C. dated back   D. which dated to

There are many old trees in our school, each ________ about 100 years ago．

1. A.
   dates from
2. B.
   dates back
3. C.
   dating from
4. D.
   dating back