2. 外语
  3. Living in the northwest involves a lot of problems, ______ sandstorm is the worst.

Living in the northwest involves a lot of problems, ______ sandstorm is the worst.

admin2010-02-22  42
问题 Living in the northwest involves a lot of problems, ______ sandstorm is the worst.
选项 A、not to mention
B、of which
C、let alone
D、for what
答案B
解析
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