27.---Mary, you didn’t show up at the meeting last week? ---No, I________, but my son had a sudden fever and I had to stay at home to take care of him.
Several new railways are under _____ in China .
The traffic is heavy these days . I _____ arrive a bit late , so could you save me a place?
John is fond ____ football, while his brother is crazy ____ music.
–Ann is in hospital. ---Oh, really? I _____ know ,I ____ go and visit her.
It’s important for students to employ a word or a phrase according to the _____ in the language we study .