You should not go rafting ________ you know how to swim.
| A．if | B．if not | C．when | D．unless |
I do not think jogging _____ me very much
| A．stands for | B．appeals to |
| C．gives away | D．passes away |
— I hope to take the computer course.
— Good idea. _____ more about it, visit this website.
| A．To find out | B．Finding out |
| C．To be finding out | D．Having found out |
Unless extra money_____, the theatre will close.
| A．was found | B．finds |
| C．is found | D．found |
The producer comes regularly to collect the cameras _____ to our shop for quality problems.
| A．returning | B．returned |
| C．to return | D．to be returned |
He is full of _____ about his sick mother.
| A．concern | B．blame |
| C．delight | D．comment |