Mary couldn’t make herself _______ attention to because her classmates made so much noise.

In the past few years, so many areas throughout the world have been hit by such destructive earthquakes, snowstorms and tsunamis ________ we have never experienced before, ________ makes us worried a lot about nature disasters.

—I often see him working hard in his spare time. —________he has won the scholarship from time to time.

—Wow， your house is so big！—Yes， it’s three times　　　　yours. 

—Why are you so late?—I was in half the way when it______to me that I had left my notebook home，so I had to fetch it.