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            • 1．

              Mark needs to learn Chinese_____ his company is opening a branch(分部) in Beijing.

              A．while
              B．since
              C．unless
              D．although
              难度：较难
              解析 收藏 试题篮
            • 2．

              I joined the summer camp _____ it was a great opportunity to make friends with people from different countries and learn about their cultures.

              A．though
              B．when
              C．unless
              D．since
              难度：较易
              解析 收藏 试题篮
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