试题详情
— ________ people travel every year?
—Perhaps when we are talking about it, more than 100 planes have taken off around the world.
- A、How many
- B、How much
- C、How long
- D、How often
知识点
参考答案
采纳过本试题的试卷
—Perhaps when we are talking about it, more than 100 planes have taken off around the world.