高中英语语法填空:短文题型基础练习 Test 5

Some kinds of mental skills naturally decrease as people get older. Yet research seems to show that some training can improve such skills. A recently 　61　 (publish) study also appears to demonstrate that the good effects of training can last for many years 　62　 that training has ended.

Researchers at Johns Hopkins University in Maryland wanted to learn how long memory and thinking skills would last in older people 　63　 trained to keep them. 　64　 people were part of the ten-year research project. They were taught methods meant to improve their 　65　 , thinking and ability to perform everyday tasks.

More than 2,800 volunteered 　66　 the study called ACTIVE, most studied when they were more than 70 years old.

The volunteers took one of several short training classes meant to help them keep their mental abilities. One class trained participants in skills 　67　 (include) how to remember word lists. 　68　 group trained in reasoning. A third group received help with speed-of-processing — speed of receiving and understanding information. A fourth group — the control group did not get any training.

Earlier results 　69　 (establish) that the training helped the participants for up to five years. Now, lead study writer George Rebok says, the research showed most of the training remained 　70　 (effect) a full ten years later.