In the past few years, research has suggested that Vitamin D may increase the level of serotonin(血清素), one of the key nurotransmitters influencing our mood, and ________it helps to relieve mood disorders.
At a very young age, Professor Field used to__________ books on radio.
The audience were ________ by his _______ performance on the stage. A. amused; amused B. amused; amusing C. amusing; amused
The boy is not particular about food and always eats _____ his parents give him.
—Yao Yuan, a disabled woman, won the National Championships Cup last week. —My goodness! She _______a lot of difficulties!
She spent ________ much time playing Majiang that she didn’t get enough sleep .