Choose the correct answer

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12. We need to __________ the math problem before the test.
A. warm up
B. speed up
C. work it out
D. stand for

13. The plane will __________ in ten minutes, so fasten your seatbelts.
A. turn on
B. turn up
C. take off
D. wake up

14. Could you please __________ the lights before you leave?
A. work out
B. speed up
C. turn off
D. warm up

15. It's hard to __________ from a bad habit, but it's possible.
A. stand for
B. turn around
C. wake up
D. take away

16. They had to __________ the invitation because of other plans.
A. wake up
B. turn up
C. turn down
D. work out

17. Before we play, let's __________ so we don't get injured.
A. turn on
B. warm up
C. work out
D. take off

18. Our company will __________ the smaller local business next year.
A. take over
B. wake up
C. wear out
D. turn around

19. He was completely __________ after running the marathon.
A. taken over
B. worn out
C. turned on
D. worked out

20. She didn't __________ for the class yesterday. I wonder what happened.
A. take off
B. turn up
C. take on
D. tell off