Wethe difficulty together, but why didn't you tell me?
I ______ my university professor in the supermarket near my house, which was out of my expectation.
I was not _______her presence till she spoke to me.
There is no need ______ because Mr. Smith is still sleeping.
When ____about his family, he is always refusing to answer.
----Why didn’t you see me wave to you then ? ----Oh, If so. I must say sorry. I think I____ in the other direction.