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
Fans of Youth With You are _____ to TV screens every week to follow the ups and downs of their favourite stars.
A.devoted B.accustomed C.exposed D.glued
