My English has greatly improved , ______ I practice using it every day.
A．untilB．unless C．though D．a(chǎn)s
D
考查連詞。根據(jù)上下文可知存在因果關系。結(jié)合句意可知D正確。句意：我的英語已經(jīng)有了很大的改善，因為我每天都練習使用英語。
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