Mrs Black isn’t in and I’ll have to ring _____I would appreciate it if you ring_____ after 6 o’clock.[ ]

His expression suggested that he _______ ill, so the teacher suggested that he _______ sent to hospital at once.

Why didn’t you come to Mike’s birthday party yesterday?—Well, I ____, but I forgot it.

She is quite familiarthemusic that they are dancing.

276. Computer technology has _____ arevolution in business practices. Which of the following words is not suitableto be put in the blank