单项选择题
The hosts apologized for ______ that some of their guests might be vegetarians.
单项选择题 ______ the popularity of robots in Japan, the country’s robot-production growth is slowing down.
单项选择题 Not all birds can fly , ______ do all birds build nests.
单项选择题 When you fall in love for the first time, it’s surprising ______ inconveniences you can put up with.
