She was so ______about the problem explained by her partner that she wore a ______look.

It’s generally believed that the_________of the Dragon Boat Festival is to celebrate the great poet Qu Yuan.

We were told not to touch the equipment in the laboratory unless ________ [ ]

What do you think of our next game—A bit worried．We ______ it with our two major playersinjured．

Many athletes are clear that the Olympic Games are the only time ________ they will be watched by thousands of millions