1st Test

Vocabulary:
The history of English - the seven ages of English
The importance of English in the world nowadays - the British Empire and the USA (World War II)
The types of English speakers - native speakers (1 language only), ESL (two languages), EFL (you)
Varieties of English - differences in vocabulary, spelling, grammar, pronunciation
Loan words . marmalade (Portuguese), spaghetti (Italian), kindergarden (German),...

Grammar:
Conditional Clauses (without and with inversion)
I - If you study, you will get good marks - Should you study, you will get good marks.
II - If I had more time, I would check the blog. - Were I to have more time, I would check the blog.
III - If you had paid attention to my classes, you would have known everything. - Had you paid attention to  my classes, you would have known everything.

Inversion of the Subject
You never pay attention to what's important. - Never do you pay attention to what's important.

Impersonal Passive
People say that teenagers are crazy.
It is said that teenagers are crazy.
or
Teenagers are said to be crazy.