Choose the correct answer

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Question 27. He wrote to her three months ago, but I’m sure ___.
A. he doesn’t write from then
B. he hasn’t written since then
C. he wasn’t written from then
D. he didn’t write since then

Question 28. ___ than the one you are reading.
A. This book is the most interesting
B. This book is so interesting
C. This book is more interesting
D. This book is a lot interesting