Drinking coffee, having healthy foods and taking exercise are all good ways to ______ you when you are working to a tight schedule.
| A．tend | B．handle | C．refresh | D．concentrate |
Until I was twenty-three I never ________ attending night school three nights a week.
| A．doubted | B．failed |
| C．missed | D．requested |
New medicines and instruments ______ every day to extend life.
| A．develop | B．are being developed |
| C．are developing | D．have developed |
What I wanted to know was when and where the meeting ______.
| A．was holding | B．had held |
| C．was to hold | D．was to be held |
If you go there alone after dark you might get _____.
A. attacked and robbed B. attacking and robbing
B. to attack and rob D. to be attacked and robbed
A red sky in the morning _____ to be a sign of bad weather.
| A．says | B．is saying |
| C．has said | D．is said |