Kids are not allowed to leave kindergartens               their parents come to pick them up.
A．unlessB．sinceC．a(chǎn)lthough D．because
A

試題分析：A. unless 除非…否則B. since自從，因為   C. although 盡管D. because因為；句意：孩子們不允許離開幼兒園，除非他們的父母親來接他們。故選A.
點評：此題考查連詞的表面意思，并不難。對于此類連詞詞義辨析的題目，首先應(yīng)著眼于句意的理解，在理解句意的基礎(chǔ)上結(jié)合四個選項的意思，采用排除法，得出最符合題意的一項答案。在平時的學(xué)習(xí)中要勤積累，并掌握這些連詞的常用用法。
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