184.You need not to go with me unless you are free now.

183.I never buy anything unless it is not really needed.

182.I lent him the book I bought the day before.

181.He suggested me that I go to see the manager.

180.I really don’t know how to do.

179.The time is sure to come when my words come true.

178.How dare you say such thing to my face?

177.I have been waiting you for a long time.

176.The ship hardly left the port when the storm came.

175.This is the classroom for us to study.