It usually takes courage to _____ an invitation.
| A．turn down | B．turn up | C．turn out | D．turn to |
. Meeting my uncle after all these years was an unforgettable moment, ________ I will always treasure.
| A．that | B．one | C．on which | D．what |
. While teaching students, teachers should take into consideration _________ students develop at different rates.
| A．the fact that | B．since | C．as long as | D．despite of |
. The reason ________ he referred to for his success is ________ he always working hard.
| A．why, that | B．why, because | C．that, that | D．that, because |
. A little learning is not dangerous so long as you know ________.
| A．that | B．that there is a little | C．it is a little | D．that it is little |
. A look at recent trends in world fisheries reveals ________ the ocean on a global scale.
| A．how we have swiftly affected | B．that how swiftly we have affected |
| C．how swiftly we have affected | D．however swiftly we have affected |