Tom took a taxi to the airport, only ________ his plane high up in the sky.
We’ll discuss the problem ________ lunch time.
It was _______ he does _______ makes his students enthusiastic about school. (原创)
The number of people who speak English ______ large, and a large number of people _______ native speakers.
Only when he failed the exam ________ that he didn’t work hard. (原创)
I knew he failed in the final exam the moment I _______ him crying alone in the classroom.(原创)