3 sentences

1. 寄到法国的航空信邮资是多少？

   jì dào fǎ​guó de háng​kōng​xìn yóu​zī shì duō​shao?

   How much is the postage for an airmail letter to France?

   Source: UM-Corpus: Education

2. 寄封航空信到中国要多长时间？

   jì fēng háng​kōng​xìn dào zhōng​guó yào duō cháng​shí​jiān?

   How long does it take to send an airmail letter to China?

   Source: UM-Corpus: News

3. 寄往加拿大的航空信要多少邮费？

   jì wǎng jiā​ná​dà de háng​kōng​xìn yào duō​shao yóu​fèi?

   How much is the postage for an airmail letter to Canada?

   Source: UM-Corpus: Spoken