Sentence: Of what subject paper did you write today.

[Twilit1988]

My dear and respected teachers,
1 : "Of what subject paper did you write today".? correct it please.
2 : "I don't have much vocabulary of English language that's why I don't feel confident when speaking it". Correct?
3 : "A fish bone stuck in my throat". correct?
4 : "Always meet people by smiling". correct?
5 : "I helped him in improving English" correct?

[Mister Micawber]

.
1 : On what subject did you write your paper today?
2 : I don't have much English vocabulary; that's why I don't feel confident when speaking it.
3 : OK
4 : Always meet people with a smile.
5 : I helped him improve his English.
.
_________________
Native English teacher at Mister Micawber's

[Twilit1988]

Thanks Mister Micawber