The reason why he succeeded is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
The process of growing up is complex for every person, ________ there are many influential factors in a person's growth as well as the development of his personality.
| A．but | B．so | C．for | D．therefore |
The doctor was busy writing an essay in ________ with his recent research.
| A．touch | B．connection |
| C．devotion | D．comparison |
A thousand words will not leave so deep an ________ as one deed.
| A．effort | B．idea | C．opinion | D．impression |
—Mr. Black, I think you have good taste in ________ art. So would you like to take ________ look at the painting?
—Yes, I'd love to.
| A．/; a | B．a; the | C．/; the | D．an; a |
As is known to all, one of the many benefits of ________ adventure travel is teaching children how to cope with ________ unexpected.
| A．the; / | B．/; an | C．the; the | D．/; the |