_______ on time, this medicine will be quite effective.
It is his cleverness, not his strenth, ____ defeated his rival.
______ by jeep, we visited a number of cities in South China.
---Hi, Lucy.Have you heard of any good news about Frank recently?---Yeah.She ____ have done better.She has been admitted to one of the top-ten universities in the States.
He speaks English well indeed, but of course not ______ a native speaker.
—_____ that he picked up his uncle at the airport?—It was at 6:00 in the afternoon _____ he got off work.