My English teasher’s humor was_____ make every student burst into laughter.
A. so as to B. such as to C. such that D. so that
the suggested answer is B.
I don’t understand it. Would anybody give me some reason? thanks!
Quite formal use, I’d say.
Alternative register:
Our English teacher was very funny.
My English teacher made us all laugh.
But such as to is possible here. Some more examples (from Longman):
His manner was such as to offend nearly everyone he met.
But I doubt that the net outcome will be such as to drag the rest of the world out of its pit.
Indeed, no country is truly independent if its economy is such as to consign it at once to the Third World.
Did anyone say it isn’t?
My English teacher’s humor was such as to make every student burst into laughter. = My English teacher’s humor was such (an interesting humor) as to make every student burst into laughter. = My English teacher’s humor was so interesting a humor as to make every student burst into laughter.
I would think ‘such’ is a pronoun here = such a thing. So the original could be reworded as: My English teacher’s humor was such a thing that made every student burst into laughter. IMO.
.
I think it’s more:
My English teacher’s humor was such (such = of a particular type) as to make every student burst into laughter.
predeterminer, determiner, pronoun
Molly’s is precise and all-embracing.
I embrace you, H. 
Molly in Ulysses is also a beautiful woman, I think. I’d love to be embraced by Molly’s friendship. 
:oops:
thank you.
It is not a little difficult for high school students in China.
My English teacher’s humor was so hackney as to bore me to death :lol:
(Why do they always keep on choosing boring stuff as examples when compiling textbooks. It’s the main reason why some people give up learning languages - if they stuffed textbooks with something new, exciting, then maybe things would look up a little)
I’m being nitpicking here :), and the noun “humor” is uncountable, hence just “interesting humor” 
My English teacher’s humor was so as to bore me to death.
Hackneyed?
Apparently, they are both in use:
ROTFL!
What’s up, Molly? Is it too complicated to accept both hackney and hackneyed as adjectives? :lol: :shock: :lol:
My wind-breaking abilities are such as to make nearby persons squeal in olfactory terror.
hehe