My little son used to drink a lot of fruit juice but these days he        mineral water．

—When did the computer crash?—This morning，while I ________ the reading materials downloaded from some websites.(2012·福建)

In fact, more and more people ____ to live a greener, healthier and more environmentally “green life”.

—I felt it very difficult to carry on the work all by myself. —I could have helped you, but you _____me to. 

Sun Yang, a young Chinese swimming talent, ________ several gold medals before the 2012 London Olympics.