R-controlled vowels

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

n _ _ th

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

c _ _ ve

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

Howard St _ _ n

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

sw _ _ ve

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

b _ _ st

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

b _ _ nt

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

sm _ _k

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

ch _ _ p

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

st _ _

Which r-controlled vowel would complete this word? (er, ir, ur, ar, or)

bl _ _