He ________ more than 5, 000 English words when he entered the university at the age of 15.

1. A.
   has learned
2. B.
   would have learned
3. C.
   learned
4. D.
   had learned

He ________ more than 5,000 English words when he entered the university at the age of 15.

A. has learned     B. would have learned    C. learned       D. had learned

He ______ more than 5,000 English words when he entered the university at the age of 15 .

A. has learned       B. would have learned       C. learned       D. had learned

He          more than 5,000 English words when he entered the university at the age of 15.

       A．has learned                                          B．would have learned

       C．learned                                               D．had learned

He _____ more than 5,000 English words when he entered the university at the age of 15.

  A. has learned                              B. would have learned

  C. learned                                  D. had learned