In terms of agriculture，the heavy snowfall is beneficial because when the snow covers the fields，the low temperature can kill the insects inside the earth.（）

（）once said that the most beautiful things in our world...

单项选择题（）once said that the most beautiful things in our world are created by Labor，by the wise hands of human being.

Academic posters could be an（）way of communicating conc...

填空题Academic posters could be an（）way of communicating concisely，visually and attractively.

One of them threatened me with a knife（）the other bound...

单项选择题One of them threatened me with a knife（）the other bound and gagged me.