High hopes

 It was Herbert who heard that Henry had high hopes for the hotel.

This silly sentence practises the /h/ sound. Be careful, the h in English is soft and breathy, there is no direct contact in it, unlike the Spanish "jota" or the Greek X.

Tongue-twister

Clever Quentin's climbing quite quickly.
Or, Quiet, clever Quentin's climbing quite quickly.

Tongue-twisters

Today's tongue-twister is Roberta ran rings around the Roman ruins. Yesterday was Cool, clean and quite clever. Tomorrow's will be Brad Pitt bought very bad wine.
These sentences help practise some of the English phonemes.

Interactive phonemic chart

A nice interactive phonemic chart
http://www.teachingenglish.org.uk/article/phonemic-chart?utm_source=facebook-teachingenglish&utm_medium=wallpost&utm_campaign=bc-teachingenglish-facebook

These tongue twisters are supposed to be for children, but even if you are an adult you could try them!
http://learnenglishkids.britishcouncil.org/en/tongue-twisters?utm_source=facebook-teachingenglish&utm_medium=wallpost&utm_campaign=bc-teachingenglish-facebook