单项选择题
To our ______, Geoffrey’s illness proved not to be as serious as we had feared.
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".
