The children kept their eyes ______ while they _______ Liu Qian’s tricks.

Polar explorers have to be extremely_____ to bear the climate and other hardships.

Do you know________-8,844.43 meters. It’s a popular place with mountain climbers.

I saw a boy in the supermarket yesterday, reminded me of my good friend.

_________the exams to worry about, I have to workreally hard this weekend.