I was wondering what to do and＿＿＿＿＿＿Mr. Wang came in. 

My house is located near the main street, so my family were____ upset by the outside noise.

Work gets done __________ when people do it together, and the rewards are higher too. 

27．My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive . 

It was raining hard. Little Tom felt cold, so he stood______to his mother.