The potato is a plant ____ in places ____ it is too cold to grow some other plants.

He wrote a letter ______ he explains what had happened in the accident.

Now Yiwu Commodity City is famous ______ the world _____ its varieties of goods and low prices with high quality

May I speak to Tom, please?—But he ____ for work an hour ago.

Mr. Smith felt upset for being ______ from the concert he had longed for.