It was A bad attempt
Hi, guys.
I'm extremely sad (today). I want to go to Canada,
The and last Wednesday I took a test for a school exchange (program).
I want(ed) to have (get) a(n) English certificate but I didn't pass my quiz.
I had an oral test (exam) (as well as) and a write (written) test.
When I was talking with a (the) teacher in (during) my oral test (exam), I was so nervous and (that) I didn't say something(s).
I need help
This is well written, but you have a few problems with tenses being used as well as when / how to use (the/a/an) [definate articles]
It was a bad attempt
Hi, guys.
I'm extremely sad. I want to go to Canada.
The last wednesday I took a test for a school exchange.
I want to have a English certificate but I didn't pass my quiz.
I had an oral test and a write test.
When I was talking with a teacher in my oral test I was so nervous and I didn't say something.
I need help
'The last wednesday' : Last Wednesday
'I want to have a English certificate' : I wanted to get/obtain an English certificate
'a write test' : a written test
'in my oral test' : during my oral test
'and I didn't say something' : that I didn't say anything OR that I forgot to say something
Better luck next time ! You should be more confident.