从选项中选出与问句相对应的答语,并将标号填在题前括号内。(5分)
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.
根据A栏的问题,选择B栏的答语。