—It isn’t very nice if someone is yelling in public.
—________. It’s annoying.

Obviously, the ability to talk is ______ that marks humans off from animals.

句意：Jack Ma is ambitious about his firm’s future, ______ that Alibaba’s achievements will one day top Walmart.

Treat the flowers right and your garden will be the ______ of the neighborhood.

I needn’t have been in that hurry. The flight to Chongqing ______ due to the foggy weather.