单项选择题
The advertisement says this material doesn’t ______ in the wash, but it has.
单项选择题 It is estimated that, currently, about 50000 species become ______ every year.
单项选择题 It is not easy to ______ oneself of his bad habits, just as the proverb says, "Old habits die hard".
单项选择题 She refused to tell us the ______ of the news although we insisted that she should.
