The “eat-up” campaign, ______ by Xu Zhijun and his three friends, has raised awareness of food waste all over the country.

I can’t say a thank you ________ much. I couldn’t have succeeded without your help.

She has been working hard day and night, which of course, _______ her pale face.

The keeper of the spring cleared away the leaves and branches, and wiped away the silt(淤泥) that would _______ have choked and polluted the fresh flow of water.

---Your ceiling requires ________. --- Yes, I’ll have some workers _______ it