A. | has learned | B. | learns | C. | have learned | D. | learned |
分析 句意:凱特自從5歲以來就已經(jīng)學(xué)跳舞了.因此她跳舞跳的很好.
解答 答案:A 根據(jù)since she was 5,可知在這里since意為"自從",是現(xiàn)在完成時(shí)的標(biāo)志.且此句的主語是Kate,為第三人稱單數(shù),現(xiàn)在完成時(shí)的構(gòu)成:have或has+動(dòng)詞過去分詞.因此用has learned.故選A.
點(diǎn)評(píng) 本題考查了由since引導(dǎo)的現(xiàn)在完成時(shí)的用法.since+過去的一個(gè)時(shí)間點(diǎn),這個(gè)時(shí)間短語通常用于現(xiàn)在完成時(shí).
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