________ online courses may not be perfect, they are still the only choice at present.
A.Because B.Although C.Unless D.While
As a teacher, I chose those classical songs I listened to ________ my students these days.
A.relax B.relaxing C.to relax D.relaxed
At 10 a.m. on April 4, 2020. People all over China stood in ________ to mourn those who died in the novel corona-virus disease.
A.spirit B.service C.silence D.surprise
— How do you find the two novels?
— ________ of them are interesting, and I have read them for several times.
A.Either B.Neither C.Both D.All
Since China started 5G commercialization (商用) in June 2019, many Chinese companies ________ to provide 5G services.
A.started B.were starting C.start D.have started
Brexit (脱欧) used to be the No. 1 topic ________ news channels for years in the UK, but now it has given away to coronavirus.
A.in B.on C.by D.for
