According to scientists, our mental abilities begin to ___ from the age of 27 after reaching the highest level at 22.
| A．differ | B．shrink | C．fail | D．decline |
Dr. Frank failed many times but he finally _________ to find a successful way to solve the problem.
| A．broke through | B．put up | C．picked out | D．gave away |
It is said ______ vegetables and fruits are good to our health, apples and pears _________.
| A．that, including | B．what, including | C．that, included | D．what, included |
On August 15th, 2012, many people volunteered to Lei Feng Memorial in Fushun, Liaoning Province ___________ this great soldier(1940---1962).
| A．in memory of | B．in favor of | C．in case of | D．in support of |
Jack, please do not _______ yourself in that matter, or you will be in great trouble.
| A．promote | B．improve | C．compete | D．involve |
Yoga is a kind of _______ activity. It can make people _______.
| A．relaxing, relaxed | B．stressed, stressful |
| C．relaxed, relaxing | D．stressful, stressful |