Considering his poor health, the doctor insisted on his ________ a good rest before going back to work.

More than one student in our class _________ to Shanghai Expo

Many people in the city wonder _____the city officials have the information they need to solve the problem

If you are not satisfied with our work, you can complain to the manager who is _________ customer service.

I think listening is just as __________as speaking in English learning.