A． Martian spacesuits will have larger air tanks.
B． Martian spacesuits will be equipped with special weights.
C． Martian spacesuits will be more flexible.
D． Martian spacesuits will be less durable.

A． They describe how habits affect our behaviour.
B． They are on issues facing office workers today.
C． They investigate the functions of the brain.
D． They reveal how memories are developed.

A． It enabled the researchers to track participants' memories.
B． It provided exciting images of famous people and places.
C． It stimulated volunteers' memories of a given moment.
D． It caused subjects to forget their memories for a while.