Pleasant music is often played ________ classes to make students refreshed and relaxed for a while.
There will be a big library in our school at the end of 2014. There are more than twice_________________ in 2013.
—The new film Transformers 4 we saw yesterday was quite________, wasn’t it ? —Yes, and we were really_________________ when seeing it.
—What are you busy ___? —I’m busy ___ a letter to my mother.
There’s somebody walking behind us. I think ___.
The girl devoted all her free time she had __ others.