【题目】The girl used to be shy, but is ______ getting active in group work and is more willing to express herself.
A.gradually
B.usually
C.previously
D.merely

【答案】A
【解析】句意：那个女孩过去很害羞，但现在团队合作越来越积极，（比以前）更愿意表达自己的想法。A.gradually“逐渐地”；B.usually“通常，经常”；C.previously“以前”；D.merely“仅仅”。故选A项。