2. 外语
  3. Take 60mg up to four times a day, ______ advised otherwise by a doctor.

Take 60mg up to four times a day, ______ advised otherwise by a doctor.

admin2011-01-26  47
问题 Take 60mg up to four times a day, ______ advised otherwise by a doctor.
选项 A、if
B、until
C、though
D、unless
答案D
解析 本题测试连词的用法。If“如果”；until“直到”；though“虽然，尽管”；unless“除非”。根据题意，故答案为D。
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