____ is this book?50 yuan.A.How many B.How much C.How about
( ) You should ___________ your little brother when your mother is out.
( ) Sometimes walking is __________ than driving during the busy traffic time.
( ) My sister was born _____________ a Friday morning.
( ) Mary is a student of___________.
( ) What __________ useful book! And __________book is very interesting.