This factory produced much dirty water, which resulted in a wide______of environmental problems.
To keep healthy, you should eat any of the food that is offered on the table _______ it is not well cooked.
A poet and artist with high fame ______ coming to speak to us about Chinese literature and painting tomorrow afternoon.
------Sorry, I made a mistake again. ----------_________. Practise more and you’ll succeed.
__________you were coming today, I’d have met you at the railway station.
Who would you like to have __________the letter?