【题目】______ Jack Ma has stepped down as chairman of Alibaba, he still remains on its board of directors.
A. Since B. Before
C. While D. Until
在线课程【答案】C
【解析】
考查连词辨析。A. Since自从；B. Before在……之前；C. While虽然；D. Until直到。句意：虽然马云已经辞去阿里巴巴董事长一职，但他仍然是阿里巴巴的董事会成员。故C选项正确。