Differences between crash, clash, smash and hash

[patt]

Test No. express/inter-9 "Go ahead", question 1

I'm sorry that looks awful - those two colours don't go together.

(a) smash
(b) crash
(c) clash
(d) hash

Test No. express/inter-9 "Go ahead", answer 1

I'm sorry that looks awful - those two colours clash.

Correct answer: (c) clash

Your answer was: incorrect
I'm sorry that looks awful - those two colours hash.
_________________________

what's the difference between theese 4 words: hash, crash, clash, smash.

[Torsten]

To hash means to chop into little pieces.
To smash means to break into pieces.
To crash means to collide with force.
To clash means to bang together or to disagree or conflict and this is what is needed in this context.

TOEIC listening, photographs: A couple cooking

[Fatma Zohra]

Hello Alan,
I have a question about an idiom .It is "what goes around, comes around". Thanks a lot for your help. Your essays are really efficient, cogratulation. I can assure you that since I've been with you on this programme my English improved remarkably.
Best regards
Fatma zohra