Milk will turn sour soon on hot days ______ it is stored in the refrigerator

________ is mentioned above that the number of the studentsin senior high school is increasing.

Would you like some tea, please–Yes, and I prefer tea _______ some sugar.

When the manager goes out forvacation, he always leaves his secretary ____ the factory.[ ]

It is all agreed that a good education doesn’t ________ a good job.[ ]