I find ____ difficult to remember everything, though I’m still young.

I always go to sleep _____the light on because I amafraid of the dark when I am alone in a place. [ ]

I’m surprised that John is only 25. I thought he was ________ , for he seems to be in his thirties.

___ 8.8 magnitude(震级) earthquake hit Japan on March 11.2011. It caused a huge tsunami(海啸). _____ number of people lost their lives in the natural disasters.

We keep in touch_____ writing often. [ ]