HE OFFERED TO GIVE ME A (DEMONSTRATE) ______ OF HOW THE MACHINE WO...

19. - DE THI THU DAI HOC MON TIENG ANH VA DAP AN
DE THI THU DAI HOC MON TIENG ANH VA DAP AN
19. He offered to give me a (demonstrate) ______ of how the machine worked.a. demonstrator c. demonstrateb. demonstration d. demonstrative