I wrote to my parents once a week,____ I was too busy with my teaching work.
Wind is now the world’s fastest growing ________ of power.
---Ok, I'll fix your computer right now. ---Oh, take your time..
Give me a chance, ________ I’ll give you a wonderful surprise.
— How about dinner tonight? It's on me. — ______ .
She ______ someone, so I nodded to her and went away.