Chọn đáp án đúng : It's the first time I've been to a flower shop..

Question 37. It's the first time I've been to a flower shop.
A. I haven't been to a flower shop before.
B. I have been to a flower shop before.
C. I haven't be to a flower shop before.
D. I haven't been a flower shop before.
Question 38. "You damaged my phone", said John to Mary
A. John accuse Mary of damaging his phone.
B. John accused Mary of damaging his phone.
C. John accused Mary on damaging his phone.
D. John accused Mary of damage his phone.
Question 39. If you hadn't helped me, I wouldn't have known how to
solve it.
A. Had you not helped me, I wouldn't have known how to solve it.
B. Had you helped me, I wouldn't have known how to solve it.
C. Had you not help me, I wouldn't have known how to solve it.
D. Had you not helping me, I wouldn't have known how to solve it.
Question 40. Maria is pretty but Camry is prettier.
A. Camry is the prettier of the two girls.
B. Camry is the prettiest of the two girls.
C. Camry is prettier of the two girls.
D. Camry is the prettier on the two girls.