Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks.

The USA is encouraging Americans to wear face masks. There has been a lot of talk about whether or not face masks are effective in helping slow down the (25) ____________ of the COVID -19 coronavirus. The government is set to encourage Americans to use homemade face covering like cloth masks, bandanas and scarves. At first, the WHO and (26) ____________ health organizations recommended that people (27) ____________ were not sick didn’t need to wear masks or cover their faces.(28) ____________, it is now proved that face masks can work (29) ____________. They point to countries like Singapore and South Korea, where people wear masks and reported infection rates are lower.

25. A. release              B. widening                C. lengthening             D. spread

26. A. some                 B. any                          C.a                               D. much

27. A. which               B. where                      C. why                                    D. who

28. A. Moreover          B. Although                C. However                 D. Because

29. A. effect                B. effectively              C. effective                 D. effects