一、单词填空
1.________(咀嚼) your food completely makes it easier for your body to absorb the nutrients of food.
2.The time spent on group singing, whether in a choir or at karaoke, creates a deep and lasting ________(纽带) of friendship.
3.Any given culture is a reflection of the ________(政治) and economics of a given society.
4.You should allow a little time after a meal for the food to ________(消化).
5.The book appeals to readers of all ages and establishes a literary _____(纽带) between parents and children.
6.As commercial air travel took off in the mid-20th century, a___________ began to fly at higher altitudes to lower their costs.
7.C___________ your food completely makes it easier for your body to use the nutrients of food.
8.Thousands of people lost their jobs as a direct c___________ of the crisis in America.
