Mark needs to learn Chinese________his company is opening a branch in Beijing.
(2013·山東，26)
A．unlessB．until
C．a(chǎn)lthoughD．since
　D
解析　考查狀語從句——原因狀語從句。根據(jù)題意，前后之間為因果關(guān)系，因為要開分公司，所以需要學習漢語。答案選D。
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