Achieving a high degree of proficiency in English as a foreign language is not a mysterious _____ without scientific basis.
a fire, hotel guests are asked to remain calm.
As is known to us, theory is based on practice and servers practice. A. by chance B. in turn C. in return C. by turn
As soon as their party come into they changed the law.
Food and are very important to us all.
This kind of clothes are out of nowadays.