_________ worries me the way he keeps changing his mind.
No matter how hard the government has tried to search for it, the missing Malaysian flight MH370 is still nowhere _________.
Animals are different from plants ________ they can move when they are attacked by others.
The approach _________ the problem is contrary ________ our expectations.
She is always thinking more of herself, seldom, ________, offering to help others.
---How often do you drop your e-pal a line?---_______, but usually once a week.