22. —Mr. Smith _____ in Russia for 10 years. —No wonder he can speak Russian fluently and now teaches Russian in a Chinese college.had stayed B. has stayed C. stayed D. stays
The pop star was asked many personal issues, surrounded by crowds of fans, so that his patience _______.
Only when our project has been approved of by the committee ______ to carry it out.
We are lucky to be among the generation of people who have ______ and experienced the great social changes in our country.
______ economic, political and cultural difference, China and America have decided to cooperate in dealing with global issues.
Little children ask endless questions because they are ______ about everything.