将左右两部分搭配，使其成为通顺的句子。

①Is she in the study?____   A. It's on the desk.

②Is this your bedroom?____   B. No, they aren't.

③Where's my pen?____    C. No, it isn't.

④Are they on the chair?____   D. Yes, she is.

⑤Where are my books?____    E. They are on the bed.

从地区分布看，____、北美等地区，人口自然增长率较低，个别国家甚至出现了负增长；____、非洲和拉丁美洲地区，人口自然增长率较高。