Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
calculation – n. careful thought and planning that is done usually for selfish reasons
alter – v. to change (something)
avow – v. to declare or state (something) in an open and public way
context – n. the words that are used with a certain word or phrase and that help to explain its meaning
Has the Ukrainian conflict caused great concern among your country's leaders? What do you believe caused ISIS to be formed and grow? We want to hear from you. Write your thoughts in the comments section.
