单选题
1.00分
My piano playing has improvedsignificantly since I had a new teacher.
参考答案: D
参考解析: 句意:自从我有了一位新老师之后,我的钢琴演奏提升非常大。画线单词significantly意为“大大地,显著地”。A项definitely意为“明确地,确切地”,B项generally意为“大体上”;C项certainly意为“当然,确定地”;D项greatly意为“非常,大大的”,与画线单词意义相近。故本题选D。