The drugs must ______ in every way to the standards set up by the government.

A．One cannot memorize plenty of information at one time.
B．Test of memory span is now used to study one’s processing capacity of working memory.
C．Memory span is about the number of the items people can correctly recall in order.
D．Grouping information is an effective way to cope with complex memory tests.

A．Businessmen talking within 23 inches.
B．A couple murmuring within 20 inches.
C．Some stranger walking with you shoulder by shoulder.
D．Many people crowded in a small room.