______ twice, the postman refused to deliver our letters unless we chained our dog.

In many ways China’s rapid growth has been seen as a ______ to improve thecooperation with other countries.

Everyone knows that _____ sun is in the center of thesolar system（太阳系）

_________ is it from our school to the supermarket—– Ten minutes’ ride.

Alice didn’t go to the park _____ her illness.