The practice of hanging clothes across the street is a common_____ in many parts of the city．

The news of the mayor’s coming to our school for a visit was ____ on the radio yesterday．

---I think he is taking all active Dan in social work．   ---I agree with you ________ ．

Scientists are convinced--- the positive effect of laughter___ physical and mental health．

----Do yon have a minute? I’ ve got something to tell you．

-----0K．______you make it short．

A new_____ bus service to Tianjin Airport started to operate two months ago．

Leave your key with a neighbor ______you lock yourself out one day．

----- Have you  ______ some new ideas?

------ Yeah．I’ll tell you later.

I would like a job which pays more，but _______I enjoy the work I’m doing at the moment．

 The professor managed to find some grounds (facts)_________his arguments．