填空题 Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below. For each sentence(14-18), mark one letter(A~G)on the Answer Sheet. Do not mark any letter twice.A. people's desire to seek fortune in citiesB. lack of foodC. was fallingD. in stable marriageE. not a serious problem as expectedF. women's desire for independenceG. women's improved status

填空题 During the years from 1957 to 1976, the birthrate of the United States 1.

填空题 What influences the birthrate most in the United States is 1.

填空题 The chief factor in bringing down the birthrate in Europe in the 19th century is 1.

填空题 Bringing population under control in the 21st century is 1.

填空题 Presently the stable population of rich countries is due to 1.