We’re looking forward ___________ the photo exhibition.
| A．to visiting | B．to visit | C．to having visited | D．visiting |
He made a mistake, but then he corrected the situation _______ it got worse.
| A．until | B．when |
| C．before | D．as |
—How far apart do they live？
—________ I know, they live in the same neighbourhood.
| A．As long as | B．As far as |
| C．As well as | D．As often as |
A good storyteller must be able to hold his listeners’curiosity ________he reaches the end of the story.
| A．when | B．unless |
| C．after | D．until |
Don’t be afraid of asking for help ________ it is needed
| A．unless | B．since |
| C．although | D．when |
Mr. Hall understands that _______ math has always been easy for him, it is not easy for the students.
| A．unless | B．since | C．although | D．when |