So far China ________ a lot of goods and materials（物资）to some foreign countries.
A.will give off B.gave in C.has given away D.gave up
—________ did it take to complete Huoshenshan Hospital in Wuhan, Hubei?
—Ten days! It’s a wonder!
A.How soon B.How far C.How much D.How long
Millions of Chinese students watched Internet course ________ they stayed at home.
A.when B.until C.although D.before
Hurry! The online class ________ for ten minutes.
A.has begun B.has been on C.began D.was
—How will be the weather in summer in the south of China?
—It’ll be ________ .
A.colder B.hotter C.coldest D.hottest
During the outbreak（疫情）, we are supposed to ________ close contact with strangers.
A.allow B.avoid C.attack D.afford
