There is ______ thing as a free lunch. There may be a hidden cost.
--- ___________? --- That would be great! Please drop me off at the library.
The river smells terrible. People_______ dirty things into it .
---Miss Li, where did you visit last week? --- I visited a big company __________ ships are made.
---Mum, have you seen my mobile phone? ---_______ you bought last week? I’m afraid I haven’t seen _______.
--- Bill, can I get you anything to drink? --- _________.