Choose the appropriate options to complete the sentences
1. Today, ____________ people who enjoy winter sports is much greater than that of twenty years ago.
2. According to the studies, dolphins, whales and ____________ other sea creatures use highly sophisticated navigation systems.
3. The dietary habits of a child often have ____________ to do with that child's eating habits as an adult.
4. In the United States of America, there are literacy classes for workers, ____________ of whom never graduated from high school.
5. In the first ____________ months of life, an infant learns how to lift its head, how to smile and how to recognize its parents.
6. Serving ____________ terms in Congress, Shirley Chisholm became an important United States politician.
7. Although the language learning abilities of apes have surprised ____________ scientists, they generally agree that apes do not progress beyond ____________ linguistic abilities of a two-year-old child.
8. The storm continued for ____________ of the days when we were in New Orleans,·but fortunately there wasn't ____________ damage in the city.
9. Heavy fines and jail sentences have made ____________ difference in preventing elephant poaching for their tusks.
10. Although ____________ species of fox are reddish in color, ____________ Arctic fox is often pure white.
