My brother shows __(interest) in playing computer games

问题描述:

My brother shows __(interest) in playing computer games

interest,没错

填interests,这里interest当名词,意思为兴趣,而且可数,前面没有冠词the或an之类的,就填复数

an interest
show / take an interest in 表示“对...感兴趣”是固定短语

interest

an interest
show an interest in 表示“对...感兴趣”,相当于be interested in