People are using more and more natural gas, wind and other forms of _____.
Mr Li, I can’t understand everything in class.— Don’t worry! I’ll ______ the main points at the end.
I want to be an astronaut like Yang Liwei when I grow up.—That sounds ____. I hope your dream can come true.
Bob is good at all the subjects at school,science.
________ seems to be a strong competition in China for senior high students to enter college or university.