She suggested the number of cars should be limited to stop air pollution. —_______, the idea is not very practical.

________ surprise that my first teacher,already 90, was still living and in ________ good health.

There is no exact definition of word “happiness”. People are happy for all sorts of reasons.

______ the rising rent prices in Wuhan can’t compare with those in Beijing and Guangzhou, they stillworry current college students[ ]

Every evening after dinner, if not ___ from work, I spend some time walking my dog [ ]