John, look at the time，________you play the piano at such a late hour?
| A．Must |
| B．Can |
| C．May |
| D．Need |
His mother___him stories when he was young
| A．was used to tell |
| B．is used to telling |
| C．used to tell |
| D．used to telling |
The___pass mark in the exam is 60 out of 100
| A．high |
| B．maxium |
| C．minumum |
| D．good |
Remember that people online may not be what they___because it would be easy for someone to misrepresent him or___her
| A．look |
| B．seem |
| C．appear |
| D．see |
—Some Chinese students find it difficult to understand native speakers when in London
—Exactly,___they’ve learned a lot about grammar and known many words
| A．if only |
| B．now that |
| C．as if |
| D．even if |
Though our pilots today will try to approximate the original landing site,they’re___the winds,so who knows where they’ll drift off to
| A．at the mercy of |
| B．at the call of |
| C．at the service of |
| D．at the expense of |