Why does English (17)_____ an international language meanwhile Chinese is used by more than one-fifth of the world? There are some main causes. In the

Why does English (17)_____ an international language meanwhile Chinese is used by more than one-fifth of the world? There are some main causes.
In the nineteenth century, Great Britain became (18)_____ after The Industrial Revolution. The English Empire hit many countries and made them as their colonies. English was (19)_____ used there. Gradually, those countries spoke English as their native language or second language. (20)______ the World War II, the United States, one of the English-speaking countries, become the most powerful and so then more people speak English.
English grammar is rather easy and simple compared (21)______other languages. However, English learners, even the native speakers, sometimes have troubles with English (22) ______. That can be overcome.
13. A. be B. become C. get D. have
14. A. power B. powerless C. powerful D. powerfully
15. A. rarely B. friendly C. officially D. hardly
16. A. After B. Before C. Since D. In
17. A. from B. with C. in D. on
18. A. dictation B. spoken C. written D. spelling