Without plenty of oral practice，you’ll find it hard to ______a conversation with native English speakers.

Do you know the headmaster well—Not really, just a nodding ______.

I feel so tired after a long walk.— You had better have a ______.

How long does it take you to do the projects— It _________ the survey. I’m not sure whether the survey will last long.

Fred and Jim did not like each other at first,but ______ they became friends.[ ]