Those who don’t get their sufficient sleep are actually sending a(n) _____ to severe problems in their life.
—Do you have anything in mind ____ you’d like for supper? —Well, ____ is okay with me.
I couldn't afford to rent a house like this,______buy it.
It was very cold ____ they still went swimming.
I'm not ____ my best tonight. I'd better not have anything for supper. Perhaps you'd_____me some tea.
The second runway of Hong Kong International Airport was officially ____ on May 26,1990.