.Anyone in the company should be aware ______ his duty and try his best to make contributions.
–This is the first time I _____ pictures with you . –Now it is time that you ______ a picture for me .
---Look! The telephone is broken. Someone damaged it ________ purpose. ---That may be right. But perhaps it was broken _________ accident.
Tom kept quiet about the accident ________ lose his job .
He asked me _________ his story .
Father went to his doctor for ________ about his heart trouble .