Complete the sentence. put one verb in the past perfect and one in the past simple 1. before university (study,enter) 2. he language we never (speak,hear) 3. sam teacher the picture which ,draw) 4. after columbus spain (discover,return)

1.He had studied before he entered the university.
2.He had spoken a language we never heard before.
3.Sam had showed the teacher the picture which he drawed.
4.After Colombus had discovered American he returned.