—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
— ________may I keep the book, madam?
—For two weeks.
A.How much B.How many C.How often D.How long
