- A. must I buy this book or that book?
B. Yes you must buy that book.
A. Why?
B. because that՛s more interesting. - A. Must I put on this dress or that dress?
B. you must put on this dress.
A. Why?
B. because it is more beautiful. - A. must I buy the red or the green coat?
B. I must buy the red coat.
A. Why?
B. because it’s prettier. - A. must I buy these gloves or those gloves?
B. I must buy those gloves.
A. Why?
B. because these gloves are warmer.
