Sabrina and i were excited for the opening of the new bakery.
the doughnuts we bought were the best us had ever tasted!

the antecedent in this sentence does not match the underlined pronoun in

case
person
case and number
person and number

Sabrina and I were excited for the opening of the new bakery.  

The doughnuts we bought were the best us had ever tasted!  

The antecedent in this sentence does not match the underlined pronoun in case. Option A is correct.

Case refers to a special grammatical category of a noun, pronoun, adjective, participle or numeral which value reflects the grammatical function that the  word has in a sentence in a phrase, clause or sentence.

600 grams is the answer

1. b

2. a deadly disease

4. at the same time

5. a) true

b) true

c)false?

d)false?

7. para.1 = c

para.2 = d

para.3 = f

para.4= b

para.5= e

para.6 = a