If we _________ now to protect the environment, we’ll live to regret it.
| A．hadn’t acted | B．haven’t acted | C．don’t act | D．won’t act |
How much do you ________ for repairing my CD player?
| A．pay | B．spend | C．charge | D．cost |
Follow your doctor’s advice, ______ you’ll get well soon.
| A．but | B．or | C．and | D．so |
A study shows that people _____ get medical advice from the Web actually get worse.
| A．whom | B．who | C．which | D．whose |
Neither Join nor I ______able to persuade Richard’s grandfather to attend the wedding.
| A．am | B．are | C． is | D．are to be |
My dictionary has disappeared. Who ________ have taken it?
| A．should | B．must | C．could | D．would |