To be sure
 

40-Professor Zewil is the ………….of the laboratory for molecular science.
a-teacher b-student c-manager d-director
54 My father blamed me ………………….one occasion for losing my job.
a- on b- in c- at d- over

109-Generosity is part of the Arab …………………
a-heritage b-impression c-property d-character

director - on

director
in
character