53＿＿

48.In which country are respondents over 45 more likely to feel happily matched than younger people?

• A、The U.S.A
• B、France.
• C、India.
• D、Canada.

46.How much of the land surface on Earth is covered by rainforests?

• A、More than 50%.
• B、Nearly 12%.
• C、Less than 5.3%.
• D、Around 22.5%.