问题

Warmblooded animals live an active life even in freezing winter, which helps them to________their normal body temperature. [ ]

A: keep up
B: build up
C: bring up
D: pick up

正确答案是：

同类题型

Sorry. I have lost the book you lent me yesterday. –_________

________ by adjustments to financial systems and safety nets, some of those reforms fail to ensure that the poor are not harmed.

Something as simple as______ thoughts openly can make a powerful difference to one’s health.[ ]

1I’m sorry to____ your time.–It doesn’t matter.

I’m sorry I made a mistake!–No body is perfect.