—How will you spend this summer vacation?
—I have made a(n) ____plan to take a trip to Jiuzhaigou. The schedule might be subject to change.
A.arbitrary B.authentic C.tentative D.tight
Penicillin was discovered ____, which went well beyond the researchers’ expectations.
A.on purpose B.by accident C.on occasion D.by mistake
A qualified teacher is capable of ____students’ needs and concerns.
A.instructing B.overcoming C.restoring D.anticipating
My grandpa often looks back on those days in the countryside, where he for ages.
A.worked B.has worked C.had worked D.was working
There’s a ____between Japan and IOC that 2020 Tokyo Olympic Games will be postponed by one year.
A.criterion B.coincidence C.consensus D.conflict
____ stops learning is old and stays learning is young, whether at twenty or eighty.
A.What B.Who C.That D.Whoever
