18.From the look on his face , I knew that the end had come, one way or_________.
Jack would like to go to the cinema with dad, but the film is____________for adults only.
--- How long are you staying? --- I don’t know.______________.
. In China, a number of people__________English now, and the number __________growing year after year.
. ____________ the dinosaurs disappeared still remains a mystery.
---We are afraid we can’t finish the work____________a month. ---Just take your time.