Can you tell me _____ it is proper to raise some money for her sick daughter.
---We’d better check the conditions of the car before starting our journey.---OK, ______.
---What do you think of the film called So Young?--- I think this is the most wonderful film _______ I have ever seen.
--- Can you please tell me something about life in the future?---Oh, maybe in the future, people will _______ by robots.
Scientists from different countries are trying to_______ a good way to solve the energy problem.
--- Good news. Li Na has become the first woman to reach a Grand Slam final.---Fantastic! Nothing sounds _________.