The USA is encouraging Americans (31)______ face masks.There has been a lot of talk about whether or not face masks are effective in helping slow down the spread 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 some health organizations recommended that people (32)______ were not sick didn’t need to wear masks or cover their faces.(33)______, it is now proved that face masks can work (34)______.They point to countries like Singapore and South Korea, where people wear masks and reported infection (35)______ are lower.
31. A. to wear B. wearing C. wear D. wore
32. A. which B. where C. why D. who
33. A. Moreover B. Although C. However D. Because
34 A. effective B. effectively C. ineffectively D. ineffective
35. A. rates B. levels C. percentages D. scales
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