Adrian’s hard work _________. He graduated with good grades and got into a top high school.

rk is not very profitable __________cash, but I am getting valuable experience from it.

l now, more than 120world-famous enterprises ______ companies in Tianjin Binhai New Area

John Snow found that the polluted water was _________for the outbreak of cholera.

When I got home last night, I was frightened to find that in front of my door____.