---Tell me something about your adventure in the rainforest, please.---We lost our way in the forest and ___ made matters worse was ___ night began to fall.

—The two people speak different languages and can not communicate with each other well.—Oh，I see. That’s ________ misunderstanding occurs.

 ____ I want to know is ____ I can master English in the shortest possible time.

I lost my way in complete darkness and ________ it began to rain.

With time going by, we have come to realize that creativity is _______it takes to keep a nation highly competitive.