Huawei is now ______________ established as one of the leading brands in our country.
A.firmly B.frequently C.occasionally D.appropriately
Education is ______________ survives when knowledge taught in class has been forgotten.
A.how B.who C.what D.which
My friend walked me to the bus stop and waited with me______________ the bus arrived.
A.once B.unless C.when D.until
My umbrella is gone. Who ______________ have taken it by mistake?
A.could B.should C.would D.must
Car races are recorded and uploaded to YouTube and other video platforms, ______________ they can be viewed repeatedly.
A.which B.where C.when D.there
Eager readers can check with libraries ______________ if they have people interested in book discussion.
A.seeing B.see C.to see D.to have seen
