Milk will turn sour soon on hot days ______ it is stored in the refrigerator.
It is known that the weight of an object ________ from place to place on the earth.
Hibernating animals have stored ________ fat in their bodies during the summer and autumn.
More and more people choose to shop in the supermarket,for they are especially interested in the ________ of goods on offer.
Do you think that prices of vegetables will ________?
Though the girl ________ to learn Japanese,she couldn’t catch up with her classmates.