'to put words in one's mouth'

[Antonella25]

Hello!
What is the meaning of these idioms?
-'to put words in one's mouth'-1.I didn't say that at all-you're putting words in my mouth!
-'his heart is in the right place':2.He always tries to do the best for others-his heart is in the right place?
-3.I prefer chocolate and biscuits to fruit-I've got a really sweet tooth?
-4.He gave up work last year so he has plenty of time on his hands.- to have plenty of time on your hands ?
-5.You should work harder-you really need to put your back into it!-to put your back into it?
Thank you for your time!

[Dozy]

You can usually find the meanings you want in dictionaries. E.g.:

http://idioms.thefreedictionary.com/put+words+in+mouth
http://idioms.thefreedictionary.com/heart+is+in+the+right+place
http://oxforddictionaries.com/definition/sweet+tooth
http://idioms.thefreedictionary.com/have+time+on+hands
http://en.wiktionary.org/wiki/put_one%27s_back_into

[Noorulain]

Hello D0sy mentor

I want to ask which dictionary 1 should use as beginner to advance in your opinion

Thankyou in advance