Do you know the sounds of English?

http://www.onestopenglish.com/skills/pronunciation/phonemic-chart-and-app/interactive-phonemic-chart-british-english/

Do you believe in multi-tasking?

http://www.bbc.com/future/story/20160218-why-multi-tasking-might-not-be-such-a-bad-idea

Margaret Heffernan: Dare to disagree

Is that still child labour?

http://www.bbc.com/news/business-35531022

Practice your linking words and expressions

http://www.tolearnenglish.com/cgi2/myexam/liaison.php?liaison=_connecteur_

Maybe not the most attractive, but a website full of examples and exercises on linkers and conjunctions.

Too many words? - practice being concise with these online exercises

https://owl.english.purdue.edu/exercises/6/9

In other words

Have you ever tried to unsuccessfully retrieve a word from the tip of your tongue?

http://www.bbc.com/future/story/20160202-lethologica-when-a-words-on-the-tip-of-your-tongue

Positive and negative agreement

IN, ON, AT

Have you heard of a 'pink tax' before?

http://www.bbc.com/news/magazine-35486308

Collocations GIVE

Collocations BREAK

Expressing purpose: for, to, so that