把括号里的单词通过加上-ance 或-ancy 变成名词形式,并注意单复数。 1. Despite being upset, infants show ______(accept) of a new situation quite quickly. 2. Scientists now think that ______ (endure) tests, such as cross-country running, are good for the older child's health. 3. I want to get a job as a teacher, but there aren't many ______ (vacant) at the moment. 4. The children's _______(perform) in motor mimicry fades at around two and a half years. 5. They have an extremely low______(tolerate) of physical pain when they're very young. 6. Mel can't make his mind up about anything. His _______(hesitant) is a bit worrying. 7. Even at nine months, one infant often wishes to give ________(assist) to another infant. 8. A normal _________(pregnant) lasts for about 40 weeks. 9. Some children are anxious and seem to lack _________(reassure) when they first start school.