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17. He tried to __________ when he told her the joke, but he couldn't help smiling.
A. be responsive B. keep a straight face
C. be hysterical D. be enthusiastic

18. He bought a new car just to __________, even though he couldn’t afford it.
A. make up with the peers B. get along with the Joneses
C. keep up with the Joneses D. fall in with the Joneses

19. __________, he complimented her cooking and asked for more.
A. Switching his tune B. Changing his tune
C. Switching his vibe D. Changing his aura

20. She needed some time to __________ what had happened as she was really shocked at that time.
A. take matter of B. take stock of
C. take her grasp D. take her chance
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