It’s the ability to do the job _______ matters not where you come from or what you are.

I can’t leave. She told me that I ______ stay here until she comes back. 

.The plane ______, _______ all 200 people aboard.

–Bill is warm-hearted and works hard.—________ his sister Betty. 

----Have you known Professor Jackson in our department for a long time ? ----Yes, since he _____ the our university.