He is seldom, ______, absent from school.
| A．if some | B．if any | C．if not | D．if ever |
—I didn’t know you play the piano. It sounds wonderful!
—Thank you! I ______ it when I worked in UK.
| A．learned | B．had learned |
| C．have learned | D．learn |
We are going to the theater tomorrow ______ all the tickets are sold out.
| A．when | B．unless |
| C．whether | D．because |
Once ______, the book will surely attract readers’ attention since it is related to people’s health.
| A．publishing | B．having published |
| C．published | D．to publish |
—I am worn out now. I stayed up last night to finish the report.
—Oh? You ______. The professor asked us to hand it in next week.
| A．needn’t have | B．wouldn’t have |
| C．couldn’t have | D．can’t have |
______ full preparations, Tony was quite confident about the coming interview.
| A．Make | B．Made |
| C．To make | D．Having made |