_________，this kind of disease can do great harm to people there.
| A．Occurring where |
| B．It occurs where it is |
| C．Where does it occur |
| D．Wherever it occurs |
Let’s go to give the stranger a hand.________he’s got into some trouble.
| A．Occasionally | B．Obviously |
| C．Suddenly | D．Surprisingly |
—How is your plan getting along?
—I can’t carry on ________ any longer.Someone must help me.
| A．single | B．simply |
| C．alone | D．lonely |
—Could you ________ take care of my cat while I’m away?
—Sure.Leave it to me，please.
| A．perhaps | B．possibly |
| C．maybe | D．probably |
—How do you find his advice?
—What he said sounded ________，I think.
| A．quite perfectly | B．nice and helpful |
| C．very clearly | D．polite or friendly |
—Be careful not to drop the Ming Dynasty vase.
—Yes，we can’t be ________.
| A．too careful | B．very careful |
| C．too careless | D．careless enough |