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 |
—How do you like the glasses?
—This kind of glasses made by experienced workers________ comfortably.
| A．is worn | B．wear | C．wears | D．are worn |
It is not easy to learn English well, but if you ____．You will succeed in the end.
| A．hang about | B．hang on | C．hang onto | D．hang up |
--- _____ Tracy was in such a hurry ?
---I don’t know．She might have been running to catch the bus.
| A．Why do you think | B．Why you think |
| C．Do you think why | D．Why not think |
Stressful environment leads to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.
| A．by chance | B．in other words | C．in return | D．in turn |
—You don’t see the professor from Singapore quite often, do you?
—No, we only meet ______．
| A．eventually | B．constantly | C．occasionally | D．frequently |