- 题目中心
______, the free luggage allowance is 20 kilos.
- A、
As a rule
- B、
As though
- C、
As if
- D、
参考答案：（本答案仅供参考，请以官方发布为准。）
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A
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______, the free luggage allowance is 20 kilos.
As a rule
As though
As if
A