The extremely irresponsible act led by those Japanese will definitely _________ the relationship between the two countries.

We must keep our room clean. Dirt and disease go _____ you know.

.He has __________________ the surroundings & now he is getting well on with his classmates;______________,he is treated as a normal student in the school.

If the new arrangement doesn’t _____, we’ll go back to the old one. 

Kathy ______ a lot of Japanese while working with some Japanese engineer.