_____, I don't like her sister.

Billionaires Bill Gates and Warren Buffett asked American billionaires to ______ at least half of their wealth to charities.

 Though I haven’t seen Maria for ages, I could ____ her in the crowd at the station.

I _____ some knowledge of cooking just by watching my mother doing it.

--- Believe it or not, I ______ an old friend of mine while abroad.--- Oh, it’s a small world.