About 270 million people in rural areas in China have no to safe drinking water.
| A．entrance | B．access | C．solutions | D．sources |
—Next week we’ll have the final English exam.
—Yes. Then, every minute must be made full use ________ English.
| A．of studying |
| B．to study |
| C．of being studied |
| D．of to study |
—Can I help you, sir?
—Yes. I bought this radio here yesterday, but it ________.
| A．didn’t work |
| B．won’t work |
| C．don’t work |
| D．doesn’t work |
A left-luggage office is a place where bags ________ be left for a short time, especially at a railway station.
| A．should |
| B．can |
| C．must |
| D．will |
—I heard that they went skiing in the mountains last winter.
—It ________ true because there was little snow there.
| A．may not be |
| B．won’t be |
| C．couldn’t be |
| D．mustn’t be |
—Who is the girl standing over there?
—Well, if you ________ know, her name is Mabel.
| A．may |
| B．can |
| C．must |
| D．shall |