大学英语：时态题：In recent studies

　　1. 时态题：In recent studies， young babies have been observed and tested to discover how different abilities are developed.

　　2. Thinking ability 思维能力

　　3. The baby， while seated(不能用seating) on its mother's lap， watches a “show” on a small theater stage.

　　4. Girls immediately become excited(用ed是因为这是人内心的情感，如果给别人造成某种影响应该用ing的形式) and begin to make noises that sound like language.

　　5. Seem后面只能用to do 的形式

　　6. But what have the boys been doing(现在完成进行时，表示动作持续) in the years before starting school?

　　7. It has long been assumed that +从句(长期以来，人们认为)

　　8. Require doing sth. 要求做某事