The scientist does not study nature ________ it is useful to do so. He studies it because he takes pleasure in it.
| A．until | B．though |
| C．because | D．Unless |
Few pleasure can equal _____ of a cold drink on a hot summer day.
| A．that | B．those | C．one | D．ones |
His first book _______ next month is based on a true story.
| A．published | B．to be published | C．to publish | D．being published |
Please remind me ______ he said he was going. I may be in time to see him off.
| A．when | B．where | C．how | D．what |
—Can you give me the right answer?
—Sorry, I ________. Would you repeat that question?
| A．hadn’t listened | B．haven’t listened | C．don’t listen | D．wasn’t listening |
—Did you meet the editor at the airport?
—No, he _______ away. I guess he’s in danger.
| A．has driven | B．had driven | C．has been driven | D．had been driven |