When shall we restart our business? — Not until weour plan

The problem of the present world is that those who are imaginative have little experiencethosewho are experienced have weak imagination[ ]

Sweet wormwood(青蒿) is a common plant in China. Tu Youyou is the woman______uses the plant’s special power to save millions of lives.

The girl was often heard _______ happily in her room.

It ____ me two hours to finish the work lastnight.