Melissa ________ several novels since 2018. One of them is the best-seller.
A.will write B.is writing C.has written D.wrote
—Shall we go out for a walk, Betty?
—Sorry, I ________ my clothes now.
A.am washing B.washed C.have washed D.wash
Amy usually ________ sports on Sunday mornings.
A.is having B.has C.has had D.was having
An e-book is ________ than a paper one among students today.
A.the most popular B.most popular C.more popular D.popular
Tony likes surfing the Internet, ________ he never plays online games.
A.for B.so C.or D.but
We ________ wear masks to keep away from COVID-19 in public.
A.must B.may C.can D.need