The Pacific region will be one of the fastest growing areas in the world in the 21st century. ______ shouldn’t be any doubt about it now.
--Let us see your pass, ___. ---Sure.
I can't __ the difference between them because they look like the same.
He ___ work in Hangzhou, did he?
Do you know __ to deal with this kind of person? A, how B. which C.what D. that
I ___ I will meet him in the street some day.