Achieving a high degree of proficiency in English as a foreign language is not a mysterious _____ without scientific basis.
—Have youhim to give up the job? —Yes,I have. But he doesn’t listen to me.
I was about to tell him the secret __someone patted me on the shoulder.
A number of books in the library ___been stolen so that the number of them ___ smaller than before.
You’d better have the second-hand car ______ before you sell it.
It remains________ whether Jim will be fit enough to play in the finals.