题干
Mike __________ live in London, but now he works in China.
A：is used to
B：used to
C：was used to
D：gets used to
答案(点此获取答案解析）
B
Mike __________ live in London, but now he works in China.
A：is used to
B：used to
C：was used to
D：gets used to
对一切实数
均成立，则
的取值范围是
，
的反函数是【 】.