I haven’t seen my old friends for years, I ‘m  looking  forword ______ them.

---Would you come to my birthday party tomorrow evening?---I’m afraid I ______. I have to look after my sister.

Please remind your grandpa to take medicine on time, for a man of his age ____be very forgetful．

My pen doesn’t work well. Could I borrow _____, John?

I tried more than once to persuade the taxi driver to slow down, but he just __________ listen.