_____ the secret of nature, the young scientist has little time for entertainment.
—You don’t seem to be quite yourself today. What’s wrong? —Oh, I’m suffering from a cold. Nothing serious, _____.
Our school, _____ in 1943, will celebrate its 70th anniversary this year.
—Excuse me, could you spare me some time?—Sorry, I ______ a lecture in the hall in a few minutes.
—Excuse me, could you spare me some time?
—Sorry, I ______ a lecture in the hall in a few minutes.
When I woke up, I found myself lying in ____ was called Red Star Hospital.
The safety belt saved the boy; otherwise, he _____ in the accident.