2. 外语
  3. We simply can’t compete with other companies______ we improve our engine design and reduce the cost of production.

We simply can’t compete with other companies______ we improve our engine design and reduce the cost of production.

admin2017-03-25  29
问题 We simply can’t compete with other companies______ we improve our engine design and reduce the cost of production.
选项 A、though
B、unless
C、lest
D、provided
答案B
解析 句意为：我们根本无法与其他公司竞争，除非我们改善我们的发动机设计，降低生产成本。根据句意，只有B项unless“除非”符合句意，故选B项。
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